What is a symbiotic relationship example similar to barnacles on a humpback whale

The relationship between barnacles and whales is a Commensalism relationship where only the barnacles benefit from the relationship but the whales are not harmed. Another example of a Commensalism relationship would be the Remora fish which is a fish that attaches itself to bigger fish and sharks to get a ride to other places, and does not harm the bigger fish nor does it benefit them.

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