| Planar hydroid | |
|---|---|
 | |
| Planar hydroid with reproductive bodies | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Cnidaria |
| Class: | Hydrozoa |
| Order: | Leptothecata |
| Family: | Sertularellidae |
| Genus: | Sertularella |
| Species: | S. arbuscula |
| Binomial name | |
| Sertularella arbuscula (Lamouroux, 1816) | |
The planar hydroid (Sertularella arbuscula) is a branching colonial hydroid in the family Sertulariidae. [1]
Planar hydroids are bright yellow and branched in one plane with a zig-zag appearance to the stems. The colonies usually grow up to 30 cm in height. [2]
This colonial animal is found off the southern African coast from Saldanha Bay to central Mozambique, as well as off Vema Seamount, through the Indian Ocean and off Australia, down to 219m under water. [2]
Planar hydroids live on vertical subtidal rock faces perpendicular to normal water flow. They feed on plankton. [2]
Velella is a monospecific genus of hydrozoa in the Porpitidae family. Its only known species is Velella velella, a cosmopolitan free-floating hydrozoan that lives on the surface of the open ocean. It is commonly known by the names sea raft, by-the-wind sailor, purple sail, little sail, or simply Velella.
Nucella squamosa, common name the scaly dogwhelk, is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Clinus brevicristatus, the Cape klipfish, is a species of clinid that occurs in subtropical waters of the Atlantic Ocean around South Africa where it prefers habitats with plentiful growth of seaweed. This species can reach a maximum length of 12 centimetres (4.7 in) TL.
Eudendrium ramosum, sometimes known as the tree hydroid, is a marine species of cnidaria, a hydroid (Hydrozoa) in the family Eudendriidae of the order Anthoathecata.
Obelia longissima is a colonial species of hydrozoan in the order Leptomedusae. Its hydroid form grows as feathery stems resembling seaweed from a basal stolon. It is found in many temperate and cold seas world-wide but is absent from the tropics.
The tubular sponge hydroid is a species of hydroid cnidarian. It is a member of the family Tubulariidae. These animals usually grow embedded in sponges.
The grey fan hydroid is a large colonial hydroid in the family Solanderiidae.
Hydractinia altispina, or high-spined commensal hydroid, is a small colonial hydroid in the family Hydractiniidae.
Hydrocorella africana, the shell-mimic hydroid, is a small colonial encrusting hydroid in the family Hydractiniidae.
Stylaster nobilis, the noble coral, is a branching colonial hydroid in the family Stylasteridae.
Thuiaria articulata, the jointed hydroid or sea spleenwort, is a branching colonial hydroid in the family Sertulariidae.
Corhiza scotiae, the fine hydroid, is a delicate colonial hydroid in the family Halopterididae.
Gattya humilis, the snowdrop hydroid, is a delicate colonial hydroid in the family Halopterididae.
Pycnotheca mirabilis, The feathery hydroid, is a colonial hydroid in the family Kirchenpaueriidae. Feathery hydroids are often white and grow in crowded colonies resembling upright feathers. The stems may grow to 3 cm in total height. The reproductive bodies are found at the base of the stems and resemble beehives.
Macrorhynchia filamentosa, the smoky feather hydroid, is a colonial hydroid in the family Aglaopheniidae.
Sertularella gayi is a branching colonial hydroid in the family Sertulariidae.
Sertularella polyzonias is a branching colonial hydroid in the family Sertulariidae.
Sertularella crassa is a branching colonial hydroid in the family Sertulariidae.
Sertularella decipiens is a branching colonial hydroid in the family Sertulariidae.
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