Last Updated:2025/12/04

The biologist carefully observed a three-spine stickleback in the tidepool, noting how its dorsal spines bristled when a crab approached.

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The biologist carefully observed a three-spine stickleback in the tidepool, noting how its dorsal spines bristled when a crab approached.

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生物学者は潮だまりで、北半球の沿岸や内水域に生息し、危険を感じると背びれの棘を立てて飲み込みにくくする小型魚(Gasterosteus aculeatus)を注意深く観察し、カニが近づくとその棘が逆立つ様子を記録した。

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