Bioscience:Microworlds — Secrets of Sea Urchins
Round， spiky marine creatures — these are sea urchins. When they're young， sea urchins have a completely different form. This is what a young sea urchin， or larva， looks like. Sea urchin larvae drift in the sea. Let's take a look at the dramatic transformations a sea urchin undergoes as it develops from an egg to an adult.
- Added：2006
- Country：Japan
- Duration：5
- Time of update：2011/8/25 10:46:05