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The Portuguese man o' war, Physalia physalis, is a siphonophore, related to jellyfish. A small fish called the man-of-war fish is partially immune to the stinging cells of the siphonophore and can live among the tentacles. The man-of-war fish benefits from this shelter and does not affect the Portuguese man o'war. What type of relationship is this, and why?

ACommensalism because one species benefits.
BMutualism because both species benefit.
CParasitism because one species is harmed.
DPredation because on species dies.

Verified Answer :

jaimekitten7

a because the fish benefits but the man of war is unaffected by it meaning it doesnt hurt or help therefore commensalism.

Ans. (A). Commensalism because one species benefits.

A biological association between two organisms, in which one organism gets benefit, while other organism gets neither harm nor benefit, is known as commensalism.

As in given association, man-of-war fish is getting benefit from Physalia physalis fish as this interaction provides shelter to man-of-war fish, but Physalia physalis is not affected by this interaction as it does get any benefit or harm. Hence, this relationship shows commensalism.

Thus, the correct answer is option (A).

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