
Red claw crab
Perisesarma bidens
InvertebratesFreshwater
- Care level
- Moderate
- Temperament
- Semi-aggressive
- Recommended tank
- 60 L
- Maximum size
- 5 cm
- Temperature
- 22–28 °C
- pH
- 7.5–8.5
- Diet
- Omnivore
Care at a glance
The red claw crab isn't really a freshwater animal, despite often being sold as one: it's a semi-terrestrial brackish-water crab from Southeast Asian mangrove coasts, recognisable by its purplish-brown body and bright red claws.
For it to thrive long term it needs access to land where it can dry off and breathe air, plus slightly brackish rather than pure fresh water — a tank with no land or climbing area isn't a sustainable setup. It climbs and jumps well, so fit a tight lid, and keep it alone or in a small group with plenty of hiding spots, since it's territorial towards its own kind.
Good to know
Related species
Keep Red claw crab in the BlubHub app
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Values are mainstream hobbyist guidance, not gospel — always watch what your own animals need.





