these are 2 crabs you definetly do not want in your reef tank, they love to play with/eat zoas and pali, rip the tentacles off frog spawns and enjoy eating turbo snails double there size. the red one i have had about 8 months and the white one about 2 there in there own little fncowlr soon to be moved up to a 55 or maybe a 75,
i regarly feed them frozen shrimp and on accasion go to petco and pic up a 1$ turbo snails and put in for them, they usually dont last long lol. from research i hvae done the red one will get upwards of 8"-12" and still looking for a id on the other one, its mostly nocturnal and likes to bury himself down into the crush coral durring the day to where all u can see is hit little beety eyes poking up
they are a blast to watch and i have 3 damsels and 2 chromis in with them and they nevre bother them..... the fish dart about them when they are eating picking the scraps up that come floating up.. the crabs just swat a leg at them when they get to close