A rather mucilaginous episode of the KQED series Deep Look focuses on the hagfish, an essentially blind, jawless, finless, and scaleless eel-like creature that has survived millions of years by using a torrent of naturally generated slime to suffocate prey for food. This slime grows to an enormous size and can stop even the largest of underwater predators in their respective tracks.
What keeps the boneless, jawless hagfish thriving after more than 300 million years? SLIME. The goop it exudes – a mix of mucus and special protein cells – expands to 10,000 times its original volume in less than half a second, clogging the gills of its competitors and predators, including sharks!
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