If your fish has bulging eyes, don’t be alarmed. Popeye disease is common in pet fish, and in most cases, they will fully ...

Roach fish that migrate between different lakes and water courses have larger pupils and better eyesight than roach fish that stay in one place. The adaptation makes it easier for the red-eyed ...

The aquarium won renown for breeding the ... With their mouths agape and shoe-button eyes wobbling, the infant fish entertain visitors as they often appear to meet the gaze of the spectators.

The triplefin’s eyes don’t generate their own light, instead relying on whatever light managed to filter down to the depths where the fish dwells. However, the triplefin is the first fish ...