41. He finds out there is some giant green hermit crab using the ship as a shell. 42. Caribbean hermit crabs are both herbivorous and scavengers. 43. This behavior makes Hermit crabs an ideal animal model for testing predictions of vacancy chain theory. 44. A decade ago, he made millions by switching stage personas the way a hermit crab changes shells. 45. Today, students have become hermit crabs and simply take everything with them when they move into dorms. 46. That work resulted in a large number of published papers and intensive study of Mediterranean hermit crabs . 47. In his books, Bogarde described himself as a solitary figure with a " hermit crab syndrome ." 48. Once the algae and seaweed were gone, so too went the hermit crabs , ribbon worms and eels. 49. Hermit crabs fight one another for gastropod shells and have a preference for shells of certain species.50. Symbiosis exists among differing species, such as an anemone and a hermit crab , or reef-building corals and algae.