Flash Photography and Marine Wildlife: Why We Leave It Off
A whale shark glides past you, huge and slow, and your finger is already on the shutter. At that exact moment, some of the best known wildlife rules in the world say one small thing: no flash. The reasons are more interesting than a simple yes or no.
Is flash photography harmful to marine wildlife? For the small fish studied most closely, the light itself looks almost harmless. The rule stands anyway, because the rules are clear while the science is only partly there. And the thing that bothers animals most is often not the light at all. That changes how we should talk about flash: less about a camera setting, more about how we behave around the animal.
Below I separate three things: what the rules say, what the research found, and what nobody has tested yet. Where I do not know, I will say so.
A clear rule at Ningaloo
Ningaloo, in Western Australia, has some of the best known whale shark rules in the world. The state department that manages them, the Department of Biodiversity, Conservation and Attractions, says swimmers in the contact zone must stay at least three metres from the head or body of the shark and four metres from the tail. They may not use motorised propulsion aids, and they may not use flash photography.
The boats have limits too. Only one licensed vessel at a time may work within the contact zone, for a maximum of 90 minutes, and no more than 10 people may be in the water at once. Please read the current rule on the authority's page before you travel.
This is a site rule, set by the authority that licenses the tours. You may read mixed claims online about how a whale shark reacts to a quick flash. The rule at Ningaloo does not depend on winning that argument. We follow it, and so does every operator we would work with.
The Galápagos says the same, for its own reasons
Ningaloo is not alone. The Galápagos National Park rules say that flash photography is not permitted when photographing wildlife, and ask visitors to stay at least two metres away from animals, even if the animals come closer. Visitors also go with a naturalist guide authorised by the park. Please check the park's own current rules before you go.
Notice the second half of that rule. The animals in the Galápagos are famously unafraid and will walk or swim right up to you. The rule asks you to be the one who keeps the space. That idea, that the human holds the boundary and not the animal, is at the heart of how we work.
What does the research on flash and marine wildlife show?
Honestly, for most species nobody knows. The best studies I have found are about small fish that underwater photographers love.
In 2019, a team led by Maarten De Brauwer published a study in Scientific Reports on 14 bottom-living fish species that matter for scuba tourism and aquariums. It combined a field study of behaviour with two laboratory studies on seahorses, one about behaviour and feeding, and one about the anatomy of the eye and retina, the light-sensitive layer at the back of the eye. The flashes did not change the gross anatomy of the seahorses' eyes and retinas, and they did not change how well the seahorses fed. The authors concluded that the effects of photographic flashes were negligible, and no stronger than the effect of human presence alone.
An earlier study, by David Harasti and William Gladstone in 2013, looked at White's seahorse in Australia. They compared three groups of eight animals: flash, handling and a control group. The effect of flash on how the seahorses moved was not statistically significant, and there was no significant difference in whether they stayed at their sites. Handling the seahorse to take a photograph, however, did change its short-term behaviour towards the photographer. The authors judged flash photography a safe technique for that species.
What nobody has tested
Now the careful part. These studies were done on small, bottom-living fish, mostly seahorses. One account of the laboratory work notes the strobes were set to very strong output, stronger than the flashes a seahorse is likely to meet in real life. That is a worst-case design, and it makes the reassuring result more convincing for that species. But it tells us nothing about a whale shark, a manta ray or a deep-water shark. Different species may be more or less sensitive to light, and the authors say so themselves.
So I cannot tell you that a single flash blinds a whale. I also cannot tell you that flash is harmless for everything. Both statements would be guessing. Some regulators have chosen caution where the evidence is thin. In the United Kingdom, for example, both native seahorse species are protected under Section 9 of the Wildlife and Countryside Act 1981, and anyone diving or snorkelling with the intention of doing something likely to disturb them needs a wildlife licence, which includes photographing or filming them in the wild. The Marine Management Organisation considers licences for flash photography of seahorses case by case only, because an independent scientific review concluded that flash at high levels can disturb seahorses, especially together with other activities. A local no-flash rule stands either way, and it costs the photographer almost nothing.
The bigger problem is the photographer
Both studies point the same way. The stress came from people, not from the flash. Divers who moved, touched or positioned animals for a better angle caused real reactions, even without any flash at all.
For me, this is the whole lesson. The real risk is rarely a camera setting. It is someone swimming ahead of an animal to get the sun behind it, or asking a guide to repeat an approach one more time. Our story on underwater photography without the chase goes deeper into this, and the Ningaloo whale shark code explained walks through the rest of the rules in that place.
The conservation layer: why a simple rule beats a guess
Here is my own reasoning, and I label it as such. Wildlife tourism is a numbers game. One photographer with one flash may do no harm at all. But a popular site can see many boats and many cameras in a season, and a guide cannot stop in the water and judge, in the moment, whether this particular shark is bothered by this particular light. A clear rule is easier to follow, easier to explain to guests and easier for a park authority to enforce than a debate in the water.
It also protects the quieter part of the experience. When nobody is chasing the shot, the animals can behave naturally, and the people around them see more. A rule that costs a photographer one setting and protects the animal's space is, I think, a very fair trade.
Wildlife encounters are unpredictable. Underwater photography near whale sharks and other protected species should always follow local regulations and experienced professional guidance.
How to shoot kindly, anywhere
Follow the local rule first. At Ningaloo, that means no flash and the three and four metre distances. In the Galápagos, no flash and at least two metres from wildlife.
Where there is no written rule, the same habits still serve you well. Never touch, move or rearrange an animal, and never ask a guide to do it for you. Stay beside or behind a moving animal, not in front of it. Accept the picture the moment gives you. If the only way to get the shot is to change what the animal is doing, it is not the shot.
Whatever you carry, from a phone in a housing to a small action camera kit, the camera never gives you permission to enter protected water or to come closer than the rules allow. On a boat day a roll-top dry bag keeps the phone and spare batteries dry, and a low-volume mask and snorkel lets you float quietly and watch without kicking. Ocean Calling treats a strong video light near large animals like a flash, and leaves it off unless the local rule clearly allows it.
If you would like to find the kind of ocean trip where patience is part of the day, our Ocean Match can help. And if this made you curious to feel it yourself, you can explore our upcoming retreats.
Questions people ask
Is flash photography banned with whale sharks?
At Ningaloo, yes. The Western Australian authority lists no flash photography among the rules for swimmers in the contact zone, together with minimum distances of three metres from the head or body and four metres from the tail. Other places have their own rules, so always ask your guide and check the current official page.
Does a flash hurt fish eyes?
In the 2019 study of 14 benthic fish species, including laboratory work on seahorses, the researchers found no change in the gross anatomy of the eyes or retinas and no effect on feeding. They also say other species may be more sensitive to light, so the result cannot be stretched to every animal.
Is flash allowed in the Galápagos?
No. The park rules say flash photography is not permitted when photographing wildlife. They also ask visitors to keep at least two metres from animals. Check the park's current rules before you travel.
Can I use a video light instead?
I did not find research on video lights and large marine animals. Our own policy is to treat any strong artificial light like a flash around large animals: follow the local rule, and when in doubt, leave it off.
Does flash really matter if handling is the bigger problem?
It matters mostly because rules are simple to follow and to enforce. The research suggests handling and chasing do the most visible harm, but for most species nobody has tested the light, so a no-flash rule is a cheap and sensible precaution.
Can I still get good photos without flash?
Yes. Good light, patience and space do more than a flash. Let the animal's movement shape the picture, shoot what the moment gives you, and keep your distance. Natural light also makes the water colour look closer to how it feels.
Wildlife encounters are never guaranteed and never forced. Ocean Calling works only with vetted, ethical local operators, and every animal is free to approach, or not, entirely on its own terms.
Sources & further reading
- Department of Biodiversity, Conservation and Attractions (Western Australia). Whale shark management in Western Australia. Government of Western Australia.
- Galápagos Conservancy. Galápagos National Park rules.
- De Brauwer, M. et al., 2019. Behavioural and pathomorphological impacts of flash photography on benthic fishes. Scientific Reports 9, 748.
- Harasti, D. and Gladstone, W., 2013. Does underwater flash photography affect the behaviour, movement and site persistence of seahorses? Journal of Fish Biology 83(5), 1344 to 1353.
- Ningaloo Atlas. Whale shark interaction rules (secondary source, boat speed differs from the official page).
- Marine Management Organisation, GOV.UK. Seahorses: offences under the Wildlife and Countryside Act 1981 and licensing guidance (updated 17 June 2025)
- Marine Management Organisation, GOV.UK, 29 July 2026. MMO steps up activities to protect vulnerable seahorse species
Further reading on Ocean Calling: Whale sharks and humpbacks at Ningaloo · Whale shark in the Ocean Atlas · Australia in the Ocean Atlas · Underwater camera basics for beginners
Find the retreat that fits you
Small groups of up to six guests, unhurried days and local experts. Tell us how you feel in the water and we will point you to the right trip.
Explore in the Ocean Atlas
Places in this article
Animals in this article
Keep reading
Flash Photography and Marine Wildlife: Why We Leave It Off
A whale shark glides past you, huge and slow, and your finger is already on the shutter. At that exact moment, some of the best known wildlife rules in the world say one small thing: no flash. The reasons are more interesting than a simple yes or no.
Is flash photography harmful to marine wildlife? For the small fish studied most closely, the light itself looks almost harmless. The rule stands anyway, because the rules are clear while the science is only partly there. And the thing that bothers animals most is often not the light at all. That changes how we should talk about flash: less about a camera setting, more about how we behave around the animal.
Below I separate three things: what the rules say, what the research found, and what nobody has tested yet. Where I do not know, I will say so.
A clear rule at Ningaloo
Ningaloo, in Western Australia, has some of the best known whale shark rules in the world. The state department that manages them, the Department of Biodiversity, Conservation and Attractions, says swimmers in the contact zone must stay at least three metres from the head or body of the shark and four metres from the tail. They may not use motorised propulsion aids, and they may not use flash photography.
The boats have limits too. Only one licensed vessel at a time may work within the contact zone, for a maximum of 90 minutes, and no more than 10 people may be in the water at once. Please read the current rule on the authority's page before you travel.
This is a site rule, set by the authority that licenses the tours. You may read mixed claims online about how a whale shark reacts to a quick flash. The rule at Ningaloo does not depend on winning that argument. We follow it, and so does every operator we would work with.
The Galápagos says the same, for its own reasons
Ningaloo is not alone. The Galápagos National Park rules say that flash photography is not permitted when photographing wildlife, and ask visitors to stay at least two metres away from animals, even if the animals come closer. Visitors also go with a naturalist guide authorised by the park. Please check the park's own current rules before you go.
Notice the second half of that rule. The animals in the Galápagos are famously unafraid and will walk or swim right up to you. The rule asks you to be the one who keeps the space. That idea, that the human holds the boundary and not the animal, is at the heart of how we work.
What does the research on flash and marine wildlife show?
Honestly, for most species nobody knows. The best studies I have found are about small fish that underwater photographers love.
In 2019, a team led by Maarten De Brauwer published a study in Scientific Reports on 14 bottom-living fish species that matter for scuba tourism and aquariums. It combined a field study of behaviour with two laboratory studies on seahorses, one about behaviour and feeding, and one about the anatomy of the eye and retina, the light-sensitive layer at the back of the eye. The flashes did not change the gross anatomy of the seahorses' eyes and retinas, and they did not change how well the seahorses fed. The authors concluded that the effects of photographic flashes were negligible, and no stronger than the effect of human presence alone.
An earlier study, by David Harasti and William Gladstone in 2013, looked at White's seahorse in Australia. They compared three groups of eight animals: flash, handling and a control group. The effect of flash on how the seahorses moved was not statistically significant, and there was no significant difference in whether they stayed at their sites. Handling the seahorse to take a photograph, however, did change its short-term behaviour towards the photographer. The authors judged flash photography a safe technique for that species.
What nobody has tested
Now the careful part. These studies were done on small, bottom-living fish, mostly seahorses. One account of the laboratory work notes the strobes were set to very strong output, stronger than the flashes a seahorse is likely to meet in real life. That is a worst-case design, and it makes the reassuring result more convincing for that species. But it tells us nothing about a whale shark, a manta ray or a deep-water shark. Different species may be more or less sensitive to light, and the authors say so themselves.
So I cannot tell you that a single flash blinds a whale. I also cannot tell you that flash is harmless for everything. Both statements would be guessing. Some regulators have chosen caution where the evidence is thin. In the United Kingdom, for example, both native seahorse species are protected under Section 9 of the Wildlife and Countryside Act 1981, and anyone diving or snorkelling with the intention of doing something likely to disturb them needs a wildlife licence, which includes photographing or filming them in the wild. The Marine Management Organisation considers licences for flash photography of seahorses case by case only, because an independent scientific review concluded that flash at high levels can disturb seahorses, especially together with other activities. A local no-flash rule stands either way, and it costs the photographer almost nothing.
The bigger problem is the photographer
Both studies point the same way. The stress came from people, not from the flash. Divers who moved, touched or positioned animals for a better angle caused real reactions, even without any flash at all.
For me, this is the whole lesson. The real risk is rarely a camera setting. It is someone swimming ahead of an animal to get the sun behind it, or asking a guide to repeat an approach one more time. Our story on underwater photography without the chase goes deeper into this, and the Ningaloo whale shark code explained walks through the rest of the rules in that place.
The conservation layer: why a simple rule beats a guess
Here is my own reasoning, and I label it as such. Wildlife tourism is a numbers game. One photographer with one flash may do no harm at all. But a popular site can see many boats and many cameras in a season, and a guide cannot stop in the water and judge, in the moment, whether this particular shark is bothered by this particular light. A clear rule is easier to follow, easier to explain to guests and easier for a park authority to enforce than a debate in the water.
It also protects the quieter part of the experience. When nobody is chasing the shot, the animals can behave naturally, and the people around them see more. A rule that costs a photographer one setting and protects the animal's space is, I think, a very fair trade.
Wildlife encounters are unpredictable. Underwater photography near whale sharks and other protected species should always follow local regulations and experienced professional guidance.
How to shoot kindly, anywhere
Follow the local rule first. At Ningaloo, that means no flash and the three and four metre distances. In the Galápagos, no flash and at least two metres from wildlife.
Where there is no written rule, the same habits still serve you well. Never touch, move or rearrange an animal, and never ask a guide to do it for you. Stay beside or behind a moving animal, not in front of it. Accept the picture the moment gives you. If the only way to get the shot is to change what the animal is doing, it is not the shot.
Whatever you carry, from a phone in a housing to a small action camera kit, the camera never gives you permission to enter protected water or to come closer than the rules allow. On a boat day a roll-top dry bag keeps the phone and spare batteries dry, and a low-volume mask and snorkel lets you float quietly and watch without kicking. Ocean Calling treats a strong video light near large animals like a flash, and leaves it off unless the local rule clearly allows it.
If you would like to find the kind of ocean trip where patience is part of the day, our Ocean Match can help. And if this made you curious to feel it yourself, you can explore our upcoming retreats.
Questions people ask
Is flash photography banned with whale sharks?
At Ningaloo, yes. The Western Australian authority lists no flash photography among the rules for swimmers in the contact zone, together with minimum distances of three metres from the head or body and four metres from the tail. Other places have their own rules, so always ask your guide and check the current official page.
Does a flash hurt fish eyes?
In the 2019 study of 14 benthic fish species, including laboratory work on seahorses, the researchers found no change in the gross anatomy of the eyes or retinas and no effect on feeding. They also say other species may be more sensitive to light, so the result cannot be stretched to every animal.
Is flash allowed in the Galápagos?
No. The park rules say flash photography is not permitted when photographing wildlife. They also ask visitors to keep at least two metres from animals. Check the park's current rules before you travel.
Can I use a video light instead?
I did not find research on video lights and large marine animals. Our own policy is to treat any strong artificial light like a flash around large animals: follow the local rule, and when in doubt, leave it off.
Does flash really matter if handling is the bigger problem?
It matters mostly because rules are simple to follow and to enforce. The research suggests handling and chasing do the most visible harm, but for most species nobody has tested the light, so a no-flash rule is a cheap and sensible precaution.
Can I still get good photos without flash?
Yes. Good light, patience and space do more than a flash. Let the animal's movement shape the picture, shoot what the moment gives you, and keep your distance. Natural light also makes the water colour look closer to how it feels.
Wildlife encounters are never guaranteed and never forced. Ocean Calling works only with vetted, ethical local operators, and every animal is free to approach, or not, entirely on its own terms.
Sources & further reading
- Department of Biodiversity, Conservation and Attractions (Western Australia). Whale shark management in Western Australia. Government of Western Australia.
- Galápagos Conservancy. Galápagos National Park rules.
- De Brauwer, M. et al., 2019. Behavioural and pathomorphological impacts of flash photography on benthic fishes. Scientific Reports 9, 748.
- Harasti, D. and Gladstone, W., 2013. Does underwater flash photography affect the behaviour, movement and site persistence of seahorses? Journal of Fish Biology 83(5), 1344 to 1353.
- Ningaloo Atlas. Whale shark interaction rules (secondary source, boat speed differs from the official page).
- Marine Management Organisation, GOV.UK. Seahorses: offences under the Wildlife and Countryside Act 1981 and licensing guidance (updated 17 June 2025)
- Marine Management Organisation, GOV.UK, 29 July 2026. MMO steps up activities to protect vulnerable seahorse species
Further reading on Ocean Calling: Whale sharks and humpbacks at Ningaloo · Whale shark in the Ocean Atlas · Australia in the Ocean Atlas · Underwater camera basics for beginners
Find the retreat that fits you
Small groups of up to six guests, unhurried days and local experts. Tell us how you feel in the water and we will point you to the right trip.
Explore in the Ocean Atlas
Places in this article
Animals in this article