标签：Reproductive

Whale sharks swim with long-fin sharks long-fin sharks rub against whale sharks to get rid of parasites-乐生活

Whale sharks swim with long-fin sharks long-fin sharks rub against whale sharks to get rid of parasites

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Whale sharks swim with long-fin sharks: long-fin sharks rub against whale sharks to get rid of parasites

A male blueshark bites the back of the gill of another female blueshark, probably out of-乐生活

A male blueshark bites the back of the gill of another female blueshark, probably out of

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A male blueshark bites the back of the gill of another female blueshark, possibly for reproductive purposes.