But that risk pales compared to the risk of AIPAC becoming ECI or zoa.
In Penus the larv are of comparatively simple form, but in the allied genus Sergestes the zoa has a very remarkable appearance.
The zoa is a minute transparent organism, swimming at the surface of the sea.
Amongst the other Macrura the larva generally leaves the egg as a zoa similar to that of the prawns.
In the majority of the Decapoda the larva leaves the egg in a form known as the zoa (fig. 210).
In the later stages of the zoa the rudiments of the hinder thoracic limbs and of the swimmerets appear as little buds.
The next stage (fig. 215) at any rate represents the commencement of the zoa series.
Before the close of the zoa condition a small and unjointed palp appears on the mandible.