A pocket-sized pocket shark found in the Gulf of Mexico has turned out to be a new species! And the mysterious pouches up near its front fins, that it's named for squirt little glowing clouds into the ocean!

Researchers have named the species the American pocket shark, or Mollisquama mississippiensis.

The muscular glands are lined with pigment-covered fluorescent projections, indicating they squirt luminous liquid, National Oceanic and Atmospheric Administration ichthyologist Mark Grace and his collaborators wrote in the journal Zootaxa. The shark also has clusters of light-emitting cells dotted on its belly.