different hermit crab

[clownfish78]

I got 10 scarlet hermit crabs from a lfs but they most of giving me a different kind by mistake it is larger then the rest it is dark brown w/white specks on it does anyone know what hermit crab these are does anybody have hermit crads like this? it is aggersive like blue legs?

 

[marineman]

:notsure: If it gets pretty large it will likely be aggressive and consume many of your valued tankmates and corals!

 

[clownfish78]

it just 2 1/2" shell size the scarlets are only 1" long I actally have not seen it for almost 2 days but it is in a 75g i sometimes have snails and crabs disappear for few days in just reappear