Genus: Alexandrium | Dinoflagellate
Monterey Bay species: Alexandrium catenella
Click on the illustration to enlarge
Description: Armoured cells, typically spherical.
Cell Size: Less than 45um
Distribution: Coastal temperate to tropical waters.
Interesting Facts: Several species, including Alexandrium catenella, are toxic and/or bioluminescent. They produce saxitoxins, among others, which lead to paralytic shellfish poisoning.
Image 4: Alexandrium and Mesodinium, courtesy of W. Gurske. Collected at Don Edwards Wildlife Refuge, Fremont CA.
Image 5: Alexandrium catenella, courtesy of W. Gurske