arrow crab

[uglyamericanV1]

i have a 30 g tank, done cycling with no fish atm.
i was looking online for more inverts to get and saw an arrow crab. states it is reef safe, but alot of places say "with caution"

would arrow crabs bother shrimp and other crabs? what about dusters? what exactly are they a threat to? i know they are aggresive, but they have such tiny claws, so what is the deal?

do they eat up on corals or if i bought a slow invert like a sea hare will it attack it? i was planing on buying a medusa worm and would like to know if adding an arrow crab will mess this idea up (which would lead me to not buy it).

any useful info OR useful link would be appreciated!
thanks!

 

[philter4]

Not sure about corals, but they are safe with most inverts, the caution comes from thier hunting habits, they hunt at night in the rocks and sand where your fish sleep. I've seen they kill a fish that could have carried it away had it been awake. I've also heard, but never seen, of them catching cardinals hiding in a cave during the day.

 

[LPDK91]

Depends on there size. I had a large on awhile ago. He would try and eat anything he could catch. He never killed any fish. I have a smaller one now in my reef. He is about an inch or so. Great for catching worms and never touches coral.

 

[GoingPostal]

I don't know about on in that size tank, they get pretty large fast and would create space issues with other inverts. Some are fairly aggressive, trying to catch fish, mine only ate hermits, preferably the expensive scarlets. Very cool invert and I would like to get another someday, mine didn't make it through a move.

 

[uglyamericanV1]

so if i put one that was about 2.5 inches from leg to leg in my 30g it wouldnt bother my cucumber?