Why come Hermit Crabs have such a big relationship with Sea Anemones.?

hermit crabs place sea anenomes onto their backs to protect themselves from predators and in exchange the sea anenomes get a free ride.

sure, the crab harvests bits of those (and sponge too often times) and makes use of them for protection. Sorry, in the beginning up i assumed you meant phylogenetic courting. i became approximately to assert, "they're the two benthic eukaryotes".