Arrow Crab

Arrow Crab

Scientific Name: Stenorhynchus seticornis

Small Fish Safe: With caution – may prey on very small or weak fish

Invert Safe: No – known to eat small shrimp, worms, and other inverts

Coral Safe: Yes

Adult Size: Up to 10 cm body (legs span much larger)

Diet: Carnivore – scavenger that eats worms, detritus, and small inverts

Why We Like It:

The Arrow Crab brings a truly alien look to the reef, with its long spindly legs and pointed rostrum. While useful for controlling bristleworms, it can become opportunistic and may attack small tankmates. Best suited to FOWLR or mixed reef setups with robust livestock. Not for peaceful nano reefs, but a striking and functional addition for advanced hobbyists.