Ocean Atlas · Animals

Fish

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 EndangeredIn 1 Atlas country

Critically Endangered (IUCN, assessed 2018, published 2020) means it faces an extremely high risk of extinction in the wild.

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.

Where you may meet it

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.

FijiTanzaniaPapua New GuineaIndonesiaDem. Rep. CongoSomaliaKenyaSudanFr. S. Antarctic LandsTimor-LesteSouth AfricaLesothoZimbabweBotswanaZambiaMalawiMozambiqueeSwatiniBurundiMadagascarVanuatuThailandIndiaNew CaledoniaSolomon Is.New ZealandAustraliaSri LankaPhilippinesMalaysiaBruneiEthiopiaSomalilandUgandaRwandaS. SudanBaird Bay and Eyre Peninsula, AustraliaBarunguba and Narooma, AustraliaBremer Bay, AustraliaCairns, Port Douglas and the Ribbon Reefs, AustraliaChristmas Island, AustraliaCocos (Keeling) Islands, AustraliaLady Elliot Island, AustraliaLord Howe Island, AustraliaNingaloo, AustraliaRowley Shoals, AustraliaTasman Peninsula and Eaglehawk Neck, AustraliaMaria Island and the east coast, Australia

Travel with usComing soonTrusted referralExploringOn pause, story onlyEthics pass

Country colour: pink where we travel, blue where we are exploring or refer, grey for story only.

For partners

Work in ocean travel?

We are always happy to hear from exceptional local operators, accommodation, conservation organisations and destination experts. If your work fits responsible, small-group ocean travel, we would love to learn more.

Partner with Ocean Calling
You might like

7-day freediving course in Coron, Palawan

CHF 1,480