Sagenista is a group of heterokonts containing the labyrinthulids and Eogyrea, a class of yet uncultured protists. Originally, it contained the Labyrinthulids and bicosoecids. However at present the bicosoecids have been removed, and Eogyrea were added, in order to make the group monophyletic. Some have a special organelle called a (or ). It is usually found in a marine environments rich in algae and sea grass. It is capable of movement by use of this organelle. There is a debate about whether some species of Sagenista contains a photosynthetic pigment labeled chlorophyll C.