Help id this crab

[Limeblue]

Hi, anybody can help me id this small crab, it's crawling from my live rock. the size about 1 inch width. Should i keep it or throw it away? Is it dangerous to my other fish?

I keep 2 common clown, 1 razor fish, 1 hermit crab, 1 cleaner shrimp, and 1 stripped catfish. thanks.

[Limeblue]

This is my hermit crab. Is this common hermit crab? How come it's hairy?

[ho19829]

look at those claws.. ..

[Limeblue]

This hermit crab is extremely violent... he eats my fire shrimp, pinch the leg of my starfish, and in the end, also eat the small unidentified crab... How come he's like that, is it his nature?

[Limeblue]

Well in the end I got the necessary information this hermit crab is :

Dardanus pedunculatus

Hermit Crab with Anemone

Quick Stats: Hermit Crab with Anemone

Family: Diogenidae

Range: Indian Ocean to Hawaii

Size: Up to 4 inches

Diet: Omnivore

Tank Set-up: Marine: Coral or rock, sand

Reef Compatible: No

Tank Conditions: 72-78ºF; sg 1.023-1.025; pH 8.1-8.4

Temperament: Aggressive

Venomous: No

Care Level: Easy

Three Hermit Crabs of the Dardanus sp. have formed a symbiotic relationship with the anemone Calliactis polypus with which it shares a home: D. pedunculatus (Indian Ocean), D. tinctor (Red Sea), and D. deformis (Great Barrier Reef).

The anemone attached to the shell provides camouflage, protection, and the two invertebrates share food. In the wild, when the crab moves the anemone about the reef, it helps the anemones disperse. When the crab outgrows its shell, it will leave it behind and find a new, larger shell and transfer the anemone on to it or select a larger anemone.

This Hermit Crab prefers an aquarium with large amounts of stable rock work and dim light. The Hermit Crab is aggressive and makes a poor candidate for a reef or peaceful fish aquarium. It will eat fish, snails, and worms, but also detritus and some algae. As it grows, it will need larger shells, therefore, multiple sizes of gastropod shells should be available to it.

If there is insufficient algae to eat, dried seaweed should be provided. Mollusks, worms, and other meaty items can be provided.