shipworms
Watch the Wild, Never-Before-Seen Orgies of the Humble Shipworm
The mollusks give and receive sperm simultaneously, and pack tiny males into the pouches of much larger females.
A Bizarre New Species of Mollusk Eats Rocks, Poops Sand, and Shapes Rivers
Lithoredo abatanica, a very weird shipworm found in a river in the Philippines, represents both a new species and genus.
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