The by-the-wind-sailor or vellela vellela is not a jellyfish, but a colony of polyps which cohabitate. The polyps have various functions: eat, reproduce, deterrence. Together, they form an oval disk, which drifts on the waves. The by-the-wind-sailor has a triangular sail on this round disk. Using its sail, this organism travels the world seas.
via: eol.org // Photo 1: Pouringwaffles // Photo 2: NOAA













