How difficult is it to keep Japanese Freshwater Crab?

Beginner. This is a beginner-friendly species. No special equipment or experience is required, and it can be kept successfully with basic care setup.

What is the lifespan of Japanese Freshwater Crab?

The average lifespan of Japanese Freshwater Crab is Several years up to about 10. With proper care and nutrition, they can live a long and healthy life.

How large does Japanese Freshwater Crab get?

Japanese Freshwater Crab typically reaches 20-30mm carapace width as an adult. Size may vary depending on care conditions and individual genetics.

What should I feed Japanese Freshwater Crab?

Japanese Freshwater Crab feeds on: Algae, aquatic and terrestrial insects, worms and vegetables. Aim for a balanced diet with appropriate feeding frequency.

What is the typical price for Japanese Freshwater Crab?

The price of Japanese Freshwater Crab varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.

Source: Wikimedia Commons

Japanese Freshwater Crab

Beginner

Geothelphusa dehaani

A small crab endemic to Japan that spends its whole life in fresh water. The carapace is 20-30mm wide, most often dark brown with orange-red legs. Used as an indicator of clean water, it needs cool, unpolluted conditions.

Difficulty

Beginner

Temperature

22〜28℃ (typical for Tropical Fish)

Lifespan

Several years up to about 10

Size

20-30mm carapace width

Diet

Algae, aquatic and terrestrial insects, worms and vegetables

About

Geothelphusa dehaani is a crab endemic to Japan that lives entirely in fresh water. It ranges from southern Hokkaido to Nakanoshima in the Tokara Islands, with a carapace width of 20-30mm and a span of 50-70mm including the legs. Most individuals are dark brown with orange-red legs, though pale blue and purplish forms occur and the usual colour differs between local populations. The carapace is smooth, without hairs or tubercles. It lives in the upper and middle reaches of streams and serves as an indicator of the cleanest water class. It hides under stones by day and moves at night, though it is active by day in rain and will wander from the water into woods and onto roads. An omnivore, it eats algae, aquatic and terrestrial insects, snails and worms. Mating takes place from spring into early summer, and the female carries several dozen eggs of about 2mm on her pleopods. The larvae metamorphose within the egg and hatch already shaped as crabs, so the species never needs the sea. It lives from several years up to about ten.

Source: Wikipedia (CC BY-SA 4.0)