So for reference I have 3 red Cortez hermit crabs, 2 blue legged and 2 Halloween hermit crabs, I have roughly 6-10 extra shells for the smaller hermit crabs. All day today my bigger blue legged hermit crab is singling out and attacking one of my Cortez crabs, he completely ripped him out of his shell and ripped one of his arms off, I see absolutely no reason for this. At first I thought it was because the cortex had taken the shell my blue legged revelry changed out of and he wanted it back but later in the day I noticed blue had changed shells again to a bigger one similar to the one he use to have and figured they were fine but he still insisted on fighting, I just had to break them apart and set them on opposite sides of the tank (after giving Cortez a new shell because he had gotten ripped out of his) is this a common occurrence? Are blue legged hermit crabs just aggressive like this for no reason? They have ample food and I assumed a nice selection of shells in very confused on what to do and how to prevent this but unfortunately I have a feeling I will wake up ATLEAST 1 hermit crab short.
