Fig. 7

Developmental stages of thraustochytrids observed under light microscopy, (a) Clusters of vegetative cells (40 ×), (b) Clusters of vegetative cells dividing through binary fission, with 4, 6, and 8 cells (40 ×), (c) Clusters of vegetative cells containing numerous intracellular zoospores (40 ×), (d) Many spherical or limaciform amoeboid cells, (40 ×), (e) Filamentous ectoplasmic net elements around the vegetative cells (4 ×), (f) filaments of the ectoplasmic network surrounding larger vegetative cells undergoing binary division with the visible ectoplasmic network (100 ×).