The shallow, usually even-rimmed hydrothecae are sessile or borne on a hydrophore; their bottom is formed by a concentric diaphragm, with a row of small knobs distally to it.
They are so small in height as to lack an operculum, but are maintained and repaired throughout the individual animal's life.
The hydranths much exceed the hydrothecae in size and are quite sturdy.
Their endoderm consists of a proximal digestive and a distal non-digestive section.
The tentacles of some but not all carry webbing between them; likewise, the presence of nematophores, nematothecae and nematodactyls varies throughout this family.
The shallow, usually even-rimmed hydrothecae are sessile or borne on a hydrophore; their bottom is formed by a concentric diaphragm, with a row of small knobs distally to it. They are so small in height as to lack an operculum, but are maintained and repaired throughout the individual animal's life. The hydranths much exceed the hydrothecae in size and are quite sturdy. Their endoderm consists of a proximal digestive and a distal non-digestive section. The tentacles of some but not all carry webbing between them; likewise, the presence of nematophores, nematothecae and nematodactyls varies throughout this family.
Haleciidae