Contents Index of fishes General parts of a fish
	Kelvin K P Lim and Peter K L Ng

Family Oryziidae Eastern Asia. These are egg-laying toothcarps, which differ from the others by not having a protrusible upper jaw, and absence of vomerine teeth. Genus Oryzias Javan Ricefish Oryzias javanicus Ikan Medaka, Euryhaline; 4 cm; oviparous; omnivorous; gregarious; surface-dwelling. Indigenous, common in brackish water. Canals, prawn ponds, coastal rural streams and mangrove creeks. This is more of a brackish water fish although it does visit freshwater. In coastal canals, it can be seen congregating in huge numbers at the water surface. The males differ from the females by having a pointed dorsal fin. The female has the unique characteristic of carrying her eggs outside her body in a cluster, attached to the genital pole by filaments. These fish have become important experimental animals for Japanese zoologists in recent years.

Introduction Freshwater habitats Fishes in Singapore Conservation Amazing Fishy Facts About the guidebook

From A Guide to Common Freshwater Fishes of Singapore by Kelvin K P Lim and Peter K L Ng Published by the Singapore Science Centre and sponsored by BP @Raffles Museum of Biodiversity Research and Singapore Science Centre