3 public questions tagged with this topic.
The clownfish benefits from the protection of the sea anemone, while the sea anemone remains unaffected.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Population Interactions - Parasitism and Commensalism
Clownfish and sea anemones illustrate defensive mutualism because each partner can reduce the other’s exposure to enemies while receiving additional benefits. Clownfish acclimate to the anemone’s mucus and nematocysts, allowing them to shelter among tentacles that deter many predators. The fish defend the anemone from butterflyfishes, remove parasites or debris, ventilate it by swimming, and supply nitrogenous waste that can enhance productivity of the anemone and its symbiotic algae. The interaction therefore contains resource exchange, but protection is a prominent reciprocal service. It is
Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 8-13
Clownfish shelter among the stinging tentacles of sea anemones after acclimating their protective mucus, gaining refuge from many predators. Evidence also shows benefits to anemones in many systems: fish can supply nitrogenous waste, remove parasites, improve water circulation, attract prey, and defend against anemone-eating fishes. These reciprocal gains support a mutualistic interpretation rather than a one-sided association. Some elementary accounts describe the relationship as commensal because the clownfish benefit is conspicuous and the anemone benefit was historically uncertain, but mod
Ref: Ecology: From Individuals to Ecosystems, Begon et al., 5th Ed., Ch. 8-13
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