These are the invisible translucent things that brush against your fingers when you are swimming in the sea, but when you look, there's nothing there :-)
Normally I find them in ribbons all stuck together but they separate once caught and poured into a container.
They're transparent, tubular with an 'eye' at one end and jet through the water as one end of them pulsates open and closed.
Each about 1cm long.
Video clip slowed down by 50%.
Salps in Potter Pond. Probably Thalia democratica.
Dive site Outer Limits, max depth 110 ft/33.5 m.
Seen on the descent. Chain with a triangular "head."
Free floating, about 3-4 inches long.
observed 2 miles offshore at night, 35' below the surface in 1,700' of water
The Thaliacea comprise a class of marine animals within the subphylum Tunicata. Unlike their bottom-dwelling relatives the ascidians, thaliaceans are free-floating for their entire lifespan. The group includes both solitary and colonial species.