Embryonic, Larval, and Early Juvenile Development of the Tropical Sea Urchin, Salmacis sphaeroides (Echinodermata: Echinoidea)

Figure 1

Embryonic developmental stages of S. sphaeroides under compound microscopy. (a) Fertilized egg showing fertilization membrane, (b) Fertilized egg with complete fertilization membrane (c) 2-cell stage, (d) 4-cell stage, (e) 8-cell stage, (f) 16-cell stage, (g) 32-cell stage, (h) Morulla stage enclosed with fertilization membrane, (i) Blastula.

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