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A Sea Biscuit's Life

submitted by Haldaug

1 decade 6 years 1 week ago

This video shows the life cycle of the sea biscuit Clypeaster subdepressus.

The video starts with a little echinoderm porn — these animals are profligate with their gametes — and then we see early divisions, gastrulation, the formation of the pluteus larva, metamorphosis into Aristotle's lantern (one of the more charming names for a developmental stage), and into an ungainly spiky juvenile.

Via Pharyngula