Foto de stock - Nine-spined Stickleback (Pungitius pungitius) adult, swimming over gravel, with Three-spined Stickleback (Gasterosteus aculeatus) in background, England, August (controlled)

Imagen: Nine-spined Stickleback (Pungitius pungitius) adult, swimming over gravel, with Three-spined Stickleback (Gasterosteus aculeatus) in background, England.

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