Red handfish
A rare Australian fish that crawls on the sea floor using hand-like fins.
The red handfish is a critically endangered marine species endemic to Tasmania. It uses modified fins to crawl along the seabed rather than swim. Scientists are breeding it in captivity to help restore wild populations threatened by habitat loss and warming waters.
- Crawls on the sea floor using hand-like fins
- Found only on two small reefs in Tasmania
- Critically endangered due to habitat loss
- Successfully bred in captivity since 2021
- Purple urchins threaten its seaweed shelter
What it is
The red handfish is a small marine ray-finned fish with a flattened body covered in wart-like bumps. It gets its name from its pectoral fins, which resemble hands and allow it to crawl along the ocean floor instead of swimming. Two colour forms exist. One is bright red with black lines on white fin edges. The other is mottled pink with red patches and translucent fins. Adults average about 80 mm in total length.
Where it lives
This species is found only in Tasmania. Historically, it lived in several areas including Port Arthur and the Actaeon Islands. Today, wild populations are restricted to two small reefs in Frederick Henry Bay. These habitats are tiny, measuring less than 50 metres across. The fish lives at depths between one and twenty metres, preferring zones where sand meets rock and macroalgae provides cover.
How it lives
Red handfish move slowly across the seabed using their limb-like fins. They blend into their surroundings using the rocky, algae-covered environment. Their diet consists of small bottom-dwelling creatures such as crustaceans and worms. Because they do not swim well, they have low dispersal rates. This limits their ability to move to new areas if their local habitat becomes unsuitable or degraded.
Breeding and life cycle
Breeding occurs from August to October. Females attach clusters of thirty to sixty eggs to the base of seagrass. The eggs are linked by tubules. Adult fish guard these masses until the young hatch. The offspring settle directly onto the sea floor rather than floating in open water. This direct recruitment contributes to their limited range and slow population recovery.
Fish and people
Scientists study this fish closely due to its rare status. Researchers at the Institute for Marine and Antarctic Studies have established a captive breeding programme. They successfully bred the species in 2021 and again in 2023. The goal is to raise over two hundred individuals by late 2024. These captive-bred fish may be released into the wild to support declining natural populations.
Status and threats
The International Union for Conservation of Nature lists the red handfish as critically endangered. Major threats include purple urchins that eat the seaweed needed for shelter and egg attachment. Urban runoff causes pollution and siltation, which damages their habitat. Warming coastal waters also pose a risk to their reproduction and survival. Legal protections exist under Australian and Tasmanian laws.
Questions people ask about Red handfish
How does the red handfish move?
It uses its modified pectoral fins to crawl along the seabed. Unlike most fish, it does not rely on swimming for movement. This adaptation helps it navigate complex reef and sand environments where it hunts for food.
Where can you find red handfish today?
Wild populations are currently limited to two small reefs in Frederick Henry Bay, Tasmania. They live in shallow waters between one and twenty metres deep, specifically where sand, rock, and seaweed meet.
Why is the red handfish endangered?
Its habitat is shrinking due to purple urchins eating seaweed and pollution from urban areas. Warming waters also threaten its survival. The fish has a very small range and low reproduction rate, making recovery difficult.
Are red handfish being bred in captivity?
Yes. Scientists at the Institute for Marine and Antarctic Studies have successfully bred them in tanks. The programme aims to produce hundreds of fish for potential release into the wild to boost natural numbers.
Good reading and sources
The facts on this page come from the Wikipedia article "Red handfish", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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