| Lychnorhiza arubae | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Cnidaria |
| Class: | Scyphozoa |
| Order: | Rhizostomeae |
| Family: | Lychnorhizidae |
| Genus: | Lychnorhiza |
| Species: | L. arubae |
| Binomial name | |
| Lychnorhiza arubae Stiasny, 1920 [1] | |
Lychnorhiza arubae is a species of true jellyfish within the genus Lychnorhiza . It has been found in waters surrounding the Malay Archipelago.
Lychnorhiza arubae is around 23 centimetres in width. Eight pointed, velar lappets are present in each octant. The arm-disk has short filaments. The oral arms are as long as the radius of the bell disk, and are widely separated from each other. They have a few short filaments. There are two centripetal canals in between adjacent radial canals; rhopalar radial canals are broad, while inter-rhopalar ones are more narrow. [2]
Brittle stars, serpent stars, or ophiuroids are echinoderms in the class Ophiuroidea, closely related to starfish. They crawl across the sea floor using their flexible arms for locomotion. The ophiuroids generally have five long, slender, whip-like arms which may reach up to 60 cm (24 in) in length on the largest specimens.
The madreporite is a light colored calcareous opening used to filter water into the water vascular system of echinoderms. It acts like a pressure-equalizing valve. It is visible as a small red or yellow button-like structure, looking like a small wart, on the aboral surface of the central disk of a sea star or sea urchin or the oral surface of Ophiuroidea. Close up, it is visibly structured, resembling a "madrepore" colony. From this, it derives its name.
Gonionemus is a genus of hydrozoans that uses adhesive discs near the middle of each tentacle to attach to eelgrass, sea lettuce, or various types of algae instead of swimming. They are small and hard to see when hanging onto swaying seaweed. Nevertheless, they are capable of swimming when necessary. The bell is transparent, revealing the four orange to yellowish-tan gonads that lie along most of the length of the four radial canals. The pale yellow manubrium has four short, frilly lips. Up to 80 tentacles line the bell margin, with about an equal number of statocysts. Copepods are a favored prey.
Symphyotrichum is a genus of over 100 species and naturally occurring hybrids of herbaceous annual and perennial plants in the composite family Asteraceae, most which were formerly treated within the genus Aster. The majority are endemic to North America, but several also occur in the West Indies, Central and South America, as well as in eastern Eurasia. Several species have been introduced to Europe as garden specimens, most notably New England aster and New York aster.
Eldoniids are an extinct clade of enigmatic disc-shaped animals which lived in the early to middle Paleozoic. They are characterized by their "medusoid" (jellyfish-shaped) bodies, with the form of a shallow dome opening below to an offset mouth supplemented by filamentous tentacles. Internally, they have a distinctive C-shaped cavity encompassing the gut, as well as hollow radial (radiating) structures arranged around a central ring canal. Most eldoniids are soft-bodied and can only be preserved in lagerstätten, but a few species may have hosted mineralized deposits. Historically, the affinities of eldoniids was enigmatic; recently, they been assessed as cambroernid deuterostomes. Their lifestyle is still an unresolved question; some authors reconstruct eldoniids as free-floating planktonic predators similar to jellyfish, while others argue that they were passive detritivores, embedded within the seabed for much of their life.
Bougainvillia muscus is a marine invertebrate, a species of hydroid in the suborder Anthomedusae.
Olindias is a genus of hydrozoans in the family Olindiidae.
Scrinium is a genus of sea snails, marine gastropod mollusks in the family Mitromorphidae, in the superfamily Conoidea the cone snails and their allies.
Scolymia lacera, the fleshy disk coral, is a species of stony coral in the family Mussidae. It occurs on reefs in shallow waters in the Caribbean Sea, the Gulf of Mexico, the Bahamas, Bermuda and southern Florida.
Liriope is a genus of hydrozoan in the family Geryoniidae. It contains only one species, Liriope tetraphylla.
Antiguraleus permutatus is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
Mastigias siderea is a species of jellyfish in the family Mastigiidae. It is native to the southern Pacific Ocean.
Lychnorhizidae is a family of true jellyfish.
Pseudaxine kurra is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Gastrocotylidae.
Starfish, or sea stars, are radially symmetrical, star-shaped organisms of the phylum Echinodermata and the class Asteroidea. Aside from their distinguished shape, starfish are most recognized for their remarkable ability to regenerate, or regrow, arms and, in some cases, entire bodies. While most species require the central body to be intact in order to regenerate arms, a few tropical species can grow an entirely new starfish from just a portion of a severed limb. Starfish regeneration across species follows a common three-phase model and can take up to a year or longer to complete. Though regeneration is used to recover limbs eaten or removed by predators, starfish are also capable of autotomizing and regenerating limbs to evade predators and reproduce.
Libinia spinosa is a majoid crab found in mud and sand bottoms of the Southwestern Atlantic and Pacific oceans. It is a generalist feeder on organisms such as algae, sponges, cnidarians, mollusks, polychaetes, crustaceans, and small fish. It commonly engages in a symbiotic relationship with the medusa Lychnorhiza lucerna.
Atorella octogonos is a species of crown jellyfish in the family Atorellidae. It has been found in the Bahamas.
Atorella vanhoeffeni, also known as the gold-spotted crown jelly, is a species of true jellyfish in the family Atorellidae.
Nausithoe albatrossi is a species of crown jellyfish in the family Nausithoidae. It is found in the eastern Pacific Ocean.
Nausithoe picta is a species of crown jellyfish in the family Nausithoidae. It is found in the south Pacific Ocean.
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