I have several puffers and a lunar wrasse and a big hermit crab
the wrasse is about 6 inches big and has not done anything to the hermit or any of fish
I was just wondering. On two occasions now, I have found hermit crab legs laying on the bottom of my tank. Maybe the hermit crabs are fighting amongst themselves.
I have a 6" Dragon Wrass with several hermits, tiny ones and a few bigger ones . The Dragon does pick up there shells and throws them, I have never seem him kill a hermit crab. He did take out my emeralds and sally light foot.
Good Luck
Shel