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The planar hydroid (''Sertularella arbuscula'') is a branching colonial hydroid in the
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.Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. ''Two Oceans: a guide to the marine life of southern Africa''
family
Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...
Sertulariidae
Sertulariidae is a family of hydrozoans.
Genera
According to the World Register of Marine Species, the following genera belong to this family:
*''Abietinaria'' Kirchenpauer, 1884
*''Amphisbetia'' L. Agassiz, 1862
*'' Caledoniana'' Galea, 2015
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Description
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.Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. ''Two Oceans: a guide to the marine life of southern Africa''
Distribution
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.Ecology
Planar hydroids live on vertical subtidal rock faces perpendicular to normal water flow. They feed on plankton.References
Sertularellidae Animals described in 1816 {{leptothecata-stub