Story
Tiny builders
The Coral City
A giant coral reef is built slowly over hundreds of years by animals smaller than your fingertip.
Animal group
Sea creature wonders
Story
Backward grower
The Time-Traveling Jelly
One tiny jellyfish can grow younger instead of older when life gets hard, essentially reversing its own aging.
Story
A body built to heal
The Starfish's Second Chance
If a starfish loses an arm to a hungry predator, it can often grow a brand new one back.
Story
Extra beats
Three Hearts, One Octopus
An octopus has three hearts, and one of them stops beating every time it swims.