Body and mantle :

Most species of Bornella are rather drably colored

The appendages along the animal's back help to protect the exposed gills

Photo : B. anguilla

Behavior :

Bornellidae are specialized predators of hydroids

Caracterisez by :

A very extented or dilated oral veil fringed with tentacles,

Flattened or swollen cerata along the lateral edges of the mantle

Gills may be present on the inner face at the base of each cerata

Behavior :

Known to feed on plankton and small crustaceans

Photo : M. viridis

Caracterisez by :

All species of tritoniidae have fingerlike processes extending from the oral veil
The rhinophores each have a terminal digitiform projection with numerous branched subterminal excrescences.

Behavior :

The family Tritoniidae, feed exclusively on alcyonaceans, such as gorgonians and soft corals.

Photo : M. elongoriticulata