This long creature is a strange gelatinous animal and related to the bell-shaped medusa we have seen.
Physonect Siphonophore
Image courtesy of the NOAA Office of Ocean Exploration and Research, Exploring Puerto Rico’s Seamounts, Trenches, and Troughs. Download image (jpg, 1.5 MB).

This long creature is a strange gelatinous animal and related to the bell-shaped medusa we have seen on this expedition. The bright spot on the tip is a buoyant pneumatophore. Each of the clear segments below that are actually individual animals highly modified only to pulse in support of motion. In this animal, each individual has a modified body that supports single function while being connected to a common stem. We saw several siphonophores of various lengths on this expedition. Siphonophores typical prey on small crustacean plankton and small fish.

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