Catostylidae is a family of jellyfish. Members of this family are characterized by their thick, sausage-like oral arms. Description Members of the family Catostylidae are small marine jellyfish with domed bells. The eight short oral arms are broad and three-sided. There is a network of branching canals linked with the primary ring canal, but these are not joined to the gastrovascular cavity except through the sixteen or thirty two radial canals. Some of these radial canals do not extend to the edge of the bell. There are eight sense organs, known as rhopalia, which have canals extending to the margin of the bell. These jellyfish swim in jerks by contracting their circular and radial muscles, which decreases the volume of water enclosed under the bell, before relaxing them again and repeating the sequence. They have no control over the direction of locomotion and drift with the currents and tides. Genera Acromitoides Acromitoides purpurus (Mayer, 1910) Acromitoides stiphropterus (Schultze, 1897) Acromitus Acromitus flagellatus (Haeckel) Acromitus maculosus Light, 1914 Catostylus Catostylus cruciatus (Lesson, 1830) Catostylus mosaicus (Quoy & Gaimard, 1824) Catostylus ornatellus (Vanhöffen, 1888) Catostylus ouwensi Moestafa & McConnaughey, 1966 Catostylus perezi Ranson, 1945 Catostylus tagi (Haeckel, 1869) Catostylus townsendi Mayer, 1915 Catostylus tripterus (Haeckel, 1880) Catostylus turgescens (Schulze, 1911) Catostylus viridescens (Chun, 1896) Crambione Crambione bartschi (Mayer, 1910) Crambione mastigophora Maas, 1903 Crambionella Crambionella helmbiru Nishikawa, Mulyadi & Ohtsuka, 2014 Crambionella orsini (Vanhöffen) Crambionella stuhlmanni (Chun, 1896) Leptobrachia Leptobrachia leptopus (Chamisso & Eysenhardt, 1821) See also Catostylus mosaicus, jelly blubber References Daktyliophorae