Mordaciidae

Non-parasitic lamprey

Mordacia praecox

Freshwater lamprey of two Australian rivers

• Temperate
• Transcontinental
• Freshwater fish
• Oceania
• Anguilliform
• Medium
• Temperate fish

Mordacia praecox, the Australian brook lamprey or nonparasitic lamprey, is a freshwater species of southern topeyed lamprey that occurs in south-eastern Australia. It has a thin eel-like body around 12 to 15 cm (4.7 to 5.9 in) long, with two low dorsal fins on the back half. The skin is dark blue above and grey below.