Reproduction

Coral Spawning by Moonlight

A Tale of Sex and Stress in the Ocean

A coral has just spawned. Each of the hundreds of polyps releases a small pink bundle of sperm and eggs. Credit: Raphael Williams Welcome to Citizens of the Sea , a new blog series...
An adult and juvenile killer whale frolic in the water.

Menopausal Moms: A Mammal Mystery

Killer whales ( Orcinus orca ) have something in common with humans: early menopause. Credit: Robert L. Pitman, NOAA Fisheries, USA In honor of Mother's Day, the Citizens of the Sea blog salutes ocean-going...
Photo of the head of a leafy seadragon

Devoted Dads: From Seahorses to Sea Spiders

Male leafy seadragons ( Phycodurus eques ) are among the ocean's more " devoted dads ." They carry the developing eggs for about a month, until they hatch. Credit: David Gray, FishWise Professional If...