cnidarians
Cnidaria () is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in freshwater and marine environments, predominantly the latter.
Their distinguishing feature is cnidocytes, specialized cells that the ...
belonging to the order
Siphonophorae
Siphonophorae (from Greek ''siphōn'' 'tube' + ''pherein'' 'to bear') is an order within Hydrozoa, which is a class of marine organisms within the phylum Cnidaria. According to the World Register of Marine Species, the order contains 175 speci ...
.
Genera:
* ''
Erenna
''Erenna'' is a genus of cnidarians belonging to the family Erennidae.
The species of this genus are found in Europe and Northern America and Southeast Asia.
Species:
*''Erenna cornuta''
*''Erenna insidiator''
*''Erenna laciniata''
*''Erenna ...