This species of rodent, much like its freshwater cousin, builds complex wooden structures, creating artificial reefs to farm fish and seaweed. Unlike their relatives, though, their supply of wood is limited. While most rely on driftwood or tear down human docks, some populations have opted to construct intricate lures, possibly to attract human attention and provoke shipwrecks. This brings in a new source of materials to grow their ever-larger barriers.

their (live!) young gestate for. wait for it. eight to eighteen (??) YEARS. can have up to 10 at a time. good grief.

longest lifespan of any vertebrate, up to five hundred years

toxic flesh

has giant eyes but is usually blind because of a weird little crustacean that's evolved to live on and eat their eyes. this doesn't seem to bother them much.

lives in deep cold water and has the lowest swim speed and tail-beat frequency for its size across all fish species. just generally lives life in extreme slow motion

largest genome of any shark

eats everything including moose and polar bears