Moridilla brockii   Bergh,  1888 (Sea Slug)
Organism information awaits expert curation
Class: Gastropoda

Image copyrights: Bill Rudman

Size: Max length 5.0 cm TL (male)

Color: Light orange along the dorsal and lateral surface. The regon between the rhinophores and the oral tentacles, the surface of the oral tentacles, the club of the rhinophores, the surface of the cerata and the integument of the pericardial orominence are deep orange in color. The middle one third of the oral tentacles and the cnidosacs of the cerata are coated with silvery shining granules. The foot is colorless. The hermaphrodite gland which is visible through the foot is light orange.

The bright red tips to the cerata of this aeolid apparently warn potential predators of the presence of the cnidosac which contains the stinging nematocysts removed from the cnidarian food of Moridilla brockii. When disturbed, it puts on a spectacular 'startle' display, uncoiling the large rolled cerata and pointing them at the source of the disturbance.

Similar species: Phidiana militaris

Synonym (s)

Common Name (s)
Economic Importance and Threats

Habitat:  Demersal


• Tamil Nadu, Gulf of Mannar INDIA
• Andaman and Nicobar Islands, Ritchies Archipelago INDIA

Literature Source(s)
  • Ramakrishna; Sreeraj, CR; Raghunathan, C; Sivaperuman, C; Yogesh Kumar, JS; Raghuraman, R; Immanuel, T and Rajan, PT (2010) Guide to Opisthobranchs of Andaman and Nicobar Islands ZSI, Kolkata 187 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Sealifebase Available at -
  • (1998) Sea Slug Forum Australian Museum Available at -
  • (2011) Animal discoveries 2010 Zoological Survey of India 1-107 Available at -

Page last updated on:2011-08-24

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