To compensate, the fish then produce more of their own sperm in the nest. “Nest-holding males have to ejaculate again and again after removal of the rival’s sperm,” says Takegaki.

Chris Clemens of Asotin, Washington, holds a wild steelhead caught and released in the Clearwater River. The intact adipose fin between the dorsal fin and the tail distinguish the fish from ...

Spearfisher escapes shark attack by 'hugging' its tail and holding on On the last day of their holiday in Australia, Dad Keiron went out to sea to catch a fish to cook for dinner when suddenly he ...