We're going off shore for this next story - deep into kelp forests. 

These are canopies of seaweed that provide habitat to dozens of fish, urchins, sharks and crabs.

You'll find them up and down the west coast.

Starting this year, scientists will test the kelp forests for signs of radioactivity.

It's predicted to reach our shores this year from the Fukushima nuclear plant in Japan.

Professor Steven Manley teaches biology at Cal State Long Beach and he's heading up this project - called Kelp Watch.