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

A fisherman from Greenland has netted an unusual creature, to say the least, after he caught a fish that has three eyes. Photos shared on social media showed the fish with three eyes—one each on ...

With a face only a mother could love, the southern stargazer fish burrows beneath the sand with only their mouth, nostrils ...

The lake has eyes! Tourists in southwestern China got a bit of a fright when they thought they spotted a human face floating through a lake. Turns out the spooky sight was actually a fish with ...

Fish like roach that migrate between lakes and streams have larger eyes with bigger pupils, improving vision in low light.

Roach fish that migrate between different lakes and water courses have larger pupils and better eyesight than roach that stay ...

This story appears in the April 2017 issue of National Geographic magazine. The fish’s eyes are ideally suited to helping it thrive and propagate. The fish’s loins, on the other hand ...

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 ...