Question

A sedentary sea anemone gets attached to the shell lining of hermit crab. The association is :

• A. Ectoparasitism
• B. Symbiosis
• C. Commensalism
• D. Amensalism

Answer 1

The correct option is C Commensalism

Sea anemone and hermit crabs have a commensalistic relationship. Commensalism means one organism benefits and the other organism isn’t harmed by the partnership. Neither the hermit crab nor the sea anemone is negatively affected by their symbiotic and commensalistic relationship.
Ectoparasitism means any external parasitic organism (as fleas) ectozoan, ectozoon, epizoan, epizoon. parasite - an animal or plant that lives in or on a host (another animal or plant) to obtain nourishment from the host without benefiting or killing the host.
symbiosis is the interaction between two different organisms living in close physical association, typically to the advantage of both.
Amensalism is any relationship between organisms of different species in which one organism is inhibited or destroyed while the other organism remains unaffected.