Rhizophysa eysenhardti   Gegenbaur,  1860 (Hydrozoan)
Organism information awaits expert curation
Class: Hydrozoa

Pneumatophore: Pale pink with deep patch of maroon around apical pore.

Gastrozooids: 10-15 mm long. Pedicellate; tentacle slender and thread-like, 50-80 mm long. Tentilla simple, unbranched, unilateral, claret colored, 100 mm long. Nematocysts sphaeroidal 0.084 mm in diameter.

Gonodendron: Thread like pedicels, 15 mm long; pale reddish brown. Branchlets with a single palpon, asexual nectophore at tip and 3 to 4 pairs of sessile male or female gonophores.

Synonym (s)
Rhizophysa eysenhardti Gegenbaur, 1860
Rhizophysa eysenhardti Bigelow, 1911
Rhizophysa eysenhardti Totton, 1965

Common Name (s)
Economic Importance and Threats

Habitat:  Pelagic
Prey:  Zooplankton, fish eggs/larvae


• INDIA (Record: 1962-1965)
• Arabian Sea (Record: 1962-1965)
• Bay of Bengal (Record: 1962-1965)
• Tamil Nadu, Chennai Coast INDIA (Record: 2008)

Literature Source(s)
  • Daniel, R (1985) Fauna of India and the adjacent countries (Coelenterata: Hydrozoa: Siphonophora) ZSI 440 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Sealifebase Available at - http://www.sealifebase.org/
  • Dr. Ramesh, R; Dr. Nammalwar, P and Dr. Gowri, VS (2008) Database on coastal information of Tamil Nadu Report Submitted to Environmental Information System (ENVIS) Centre, Department of Environment, Government of Tamil Nadu Institute for Ocean Management, Anna University, Chennai, Tamil Nadu. Available at - http://tnenvis.nic.in/PDF/coastal%20data.pdf

Page last updated on:2010-06-23

Back to Search