Comparision of Tisochrysis and Isochrysis

Tisochrysis and Isochrysis are very similar algae that share the same family but branch off at the species and genus level. "In contrast, the T-ISO clone of Isochrysis has only 50 to 70% of the DHA of Isochrysis galbana when grown in side-by-side culture in the same conditions of light and nutrients". This quote shows that Isochrysis actually has a higher DHA content compared to Tisochrysis, making it nutritionally superior. However, Tisochrysis has a thinner cell wall and is more tolerant of higher temperatures than Isochrysis, making it a preferred species over it's cousin.

Tisochrysis has also adapted to the Polynesian islands in Taihiti, most likely explaining it's tolerance for higher temperatures.

“Part 5 Hatchery Operation: Culture of Larvae Basic Methodology, Feeding and Nutrition, Factors Influencing Growth and Survival, and Settlement and Metamorphosis.” The Hatchery Culture of Bivalves: A Practical Manual, www.fao.org/4/y5720e/y5720e0a.htm#bm10.2.1. Accessed 04 Apr. 2026.