A constant stream of sea water running through this aquarium keeps the water level at about 50 cm. The egg is spheroidal in shape. The egg is faintly pink in color, granular and almost opaque. It is homolecithal. The eggs are embedded in large, irregular jelly-masses.
Cleavage is unequal and spiral, and the micromeres are relatively large.
No polar lobes are formed. Gastrulation is by a combination of invagination and epiboly. Time is calculated from shedding of the eggs. At this time, there is a single pair of eyespots in the pre-trochal region. The hatched larvae have three to five pairs of setigerous segments and an additional pair of eyespots.