BioScience Dictionary

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Found Dinoflagellate 6 times.

Displaying results 1 to 10.

1. Class Dinophyceae (dinoflagellates)
The members of this class of fire algae (Division Pyrrophyta) are a major component of marine algae . dinoflagellates, many of which have a very strange appearance, usually move via two flagella that beat in grooves along their bodies. These organisms, which are often red in color, can produce strong toxin s; they are responsible for the deadly red tides that can kill many fish and other marine organisms. One dinoflagellate, Gessnerium catenellum, often causes red tides on the Pacific coast and Gulf of Mexico. Filter-feeding mollusks such as clams and oysters sometimes become toxic to humans and other animals due to their eating dinoflagellates. Many species of dinoflagellates are bioluminescent ; they produce a faint light when they are disturbed, thus sometimes causing nighttime waves breaking against the shore to be faintly luminous.

2. Dinoflagellates
Single-celled to colonial protistans characterized by two flagella , one girdling the cell and the other trailing the cell. Some dinoflagellates exist in coral, in a symbiotic relationship. These dinoflagellates are termed the zooxanthellae. Other dinoflagellates occur in such high numbers that the water is colored red, a phenomenon known as a red tide .

3. Division Pyrrophyta (fire algae)
This division is composed of marine organisms known as "fire" algae , so named because most of them are red in color. Fire algae are an important component of ocean plankton . The major class within this division is Class Dinophyceae, the dinoflagellate s. There are over 1100 species in this division. Members of Pyrrophyta are single-celled, photosynthetic organisms that move via two flagella . They store their food as starch , and their cell walls are made of cellulose . They usually reproduce asexually .

4. Neurotoxin
Chemical that paralyzes nerves. Neurotoxins are produced by a variety of organisms , most notably some of the heterotrophic dinoflagellates .

5. Red tides
Phenomenon associated with population explosions (blooms) of certain types of dinoflagellates ; red structures inside the dinoflagellates cause the water to have a reddish color.

6. Zooxanthella
A symbiotic dinoflagellate found living symbiotically within cnidarian s and other invertebrates.