Sea butterflies flit through the ocean on gossamer wings, each species with a style of its own. These tiny marine snails, or thecosomes, migrate up to surface waters at night to feed and sink to ...

These beautiful winged sea snails are so admired for their graceful looks they are known as sea butterflies. Now it turns out they share more with insects than just a name – they flap their ...

Until recently, the main threat to the lives of sea butterflies, tiny snails with winglike lobes that float in ocean currents, had been the fish and birds that rely on them as an important source ...

The limacina helicnia, part of the 'sea butterfly' family, was filmed swimming in super-slow-motion by Dr David Murphy, a researcher from the Georgia Institute of Technology. Analysing the footage ...