Taxonomy: Tetraselmis is a unicellular flagellate classified as: Prasinophyta (Phylum); Pyramimonadales (Order); Platymonadaceae (Family); Tetraselmis (Genus).

Morphology: Characterised by their cordiform, elliptical or almost spherical shape with a ranging size from 4 to 8 µm.


  • Perfect for live prey (Rotifers, Artemia) and mainly filter feeders (Molluscs and Crustacean larvae). Highly recommended for flatfish larvae when combined with Nannochloropsis and Isochrysis.
  • It is an excellent source of EPA and linoleic acid. Essential fatty acids for larvae development and growth performance.
  • Adequate vitamins profile: A, B1, B2, B6, C, E, nicotinic acid, pantotenic acid and folic acid. Enhance the success of larvae development.
  • Rich in amino acids which stimulate the feed intake in marine animals. Source of arginine, lysine and leucine essential for peneiad shrimp growth performance.
  • High concentration of following pigments: chlorophyll-a, chlorophyll-b, lutein, neoxanthin, violaxanthin, diadinoxanthin, zeaxanthin and β – carotene.

Biochemical composition (% dw): Min crude protein = 30; Min crude fat = 5 and Max ash = 20.

Tetraselmis is available in the following formulations:

PhytoBloom Ice Tetraselmis

1 Kg

Dry weight: min 28 %
Average cell composition:
2,0 x 109 cell/g FW

PhytoBloom Prof Tetraselmis

1 Kg/ 4 Kg

Dry weight: min 95 %
Average cell composition:
7,0 x 109 cell/g DW