planula

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English - English
The larva of a hydrozoan, which is free swimming and is covered in cilia
The very young, free- swimming larva of the cœlenterates
Sometimes used as synonymous with gastrula
{i} stage in development of a fertilized egg
the flat ciliated free-swimming larva of hydrozoan coelenterates
It usually has a flattened oval or oblong form, and is entirely covered with cilia
In embryonic development, a vesicle filled with fluid, formed from the morula by the divergence of its cells in such a manner as to give rise to a central space, around which the cells arrange themselves as an envelope; an embryonic form intermediate between the morula and gastrula