Semaeostomeae
Encyclopedia
Semaeostomeae is an order of large jellyfish
characterized by four long, frilly oral arm
s flanking their quadrate mouths. The umbrella is domed with scalloped margins, and the gastrovascular system consists of four unbranched pouches radiating outwards from the central stomach; there is no ring canal.
Jellyfish
Jellyfish are free-swimming members of the phylum Cnidaria. Medusa is another word for jellyfish, and refers to any free-swimming jellyfish stages in the phylum Cnidaria...
characterized by four long, frilly oral arm
Oral arm
An Oral arm is an anatomical structure of "true" sea jellies , which belong to the class Scyphozoa. Oral arms characterize Semaeostomeae, an order of large jellyfish....
s flanking their quadrate mouths. The umbrella is domed with scalloped margins, and the gastrovascular system consists of four unbranched pouches radiating outwards from the central stomach; there is no ring canal.