Red handfish
Thymichthys politus
One of the rarest fish on Earth, small and hidden under the seaweed, and no sighting is ever a promise.
Critically Endangered (IUCN, assessed 2018, published 2020) means it faces an extremely high risk of extinction in the wild.



Photos show the species, not always the places on this page.
Length
About 8 to 9 cm (3.1 to 3.5 in); FishBase gives a maximum of 9.0 cm standard length, and news reports describe them as usually about 8 cm (3.1 in)
Weight
No body weight was reported in the sources opened
Next to a person
About as long as a credit card, and very light
What it eats
Little is known about its diet. It is thought to eat small crustaceans and worms that live on the seabed.
Around people
Rare, look only
How it lives
It is a bottom-dweller of shallow reef and sand, most often seen under a canopy of seaweed, and FishBase gives a depth of up to about 6 m. It has no swim bladder and uses its hand-like fins to walk. Eggs are laid at the base of seagrass and guarded by the adults, and the young hatch straight onto the seabed. Its lifespan is not known from the sources opened.
Where it goes
The red handfish does not migrate. It walks slowly on its hand-like fins and has no drifting larval stage, so its young hatch on the seabed and cannot easily spread to new reefs. It once lived at several sites in south-eastern Tasmania, and now survives on two small patches of reef, each about 50 m long, in Frederick Henry Bay.
We only draw a journey on the map when scientists have tracked it or clearly documented it. For this animal we have not found one yet.
Populations
The IUCN (assessed 2018, published 2020) rates it Critically Endangered, meaning an extremely high risk of extinction. It is also Critically Endangered under Australian law, and Endangered in Tasmania. Counts have varied between sources: fewer than 100 in the wild (ABC News, January 2024), about 100 adults (Handfish Conservation Project), and fewer than 250 (news of the October 2025 release). In early 2024, 25 fish were taken into care during a marine heatwave, when the water reached almost 25 degrees Celsius, and 18 were returned in May 2024. In October 2025, 65 captive-raised fish were released into Frederick Henry Bay. Overgrazing of seaweed by sea urchins, pollution, coastal development and warming seas are the main concerns.
Meet it respectfully
This is one of the rarest fish in the world, and it is very hard to find under the seaweed, so a sighting is very unlikely. Look only from a calm distance, never touch, move or crowd it, and keep fins well off the reef and seaweed so you do not stir up silt. Local access rules were not found in the sources opened, so follow your guide. The Handfish Conservation Project asks the public to report sightings.
Fun fact
Tap the bulb to light it up.
It has no swim bladder and walks along the seabed on hand-like fins.
Its young hatch straight onto the seabed, with no drifting larval stage, so it spreads very slowly.
In October 2025, scientists released 65 captive-raised red handfish into Frederick Henry Bay, Tasmania.
Red handfish in the Ocean Atlas
Places we have researched where this animal is recorded. It is never guaranteed, and some places are for watching from the boat only.
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Sources for this page
- GBIF, with IUCN Red List category, 2025
- FishBase, 2025
- Handfish Conservation Project, Species overview
- ABC News, 2024
- Discover Wildlife, 2024
- Pulse Tasmania, 2025
- Wikipedia, Red handfish, 2026
Facts checked 5 October 2026. Photos: Unsplash licence, or Creative Commons as shown on each photo.
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