Marine protists are defined by their habitat as protists that live in marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. Life originated as ma
Alga (phytoplankton)
Diatoms are a major algae group generating about 20% of world oxygen production.
Fossil diatom frustule from 32 to 40 mya
A mixoplankton is a mixotrophic plankton, capable of both photosynthesis and predation. It is a unicellular plankton that can use a mix of different sources of energy and carbon, instead of having a s
Tintinnid ciliate Favella
Euglena mutabilis, a photosynthetic flagellate
Zoochlorellae (green) living inside the ciliate Stichotricha secunda
The mixotrophic dinoflagellate Karenia brevis, known for causing harmful algal blooms (red tides)