Rare Encounter With Piglet Squid Leaves Deep Sea Explorers Speechless

The piglet squid's unusual mantle-to-legs ratio is, in part, a consequence of how it moves through the water. According to Nautilus scientists, that mantle is filled with ammonia, which the squid uses to control its buoyancy. Ammonia, as Live Science has previously reported, is a common enough chemical on Earth but dangerous to humans.