The pouched lamprey (Geotria australis), also known as the piharau[4] in New Zealand 's North Island, korokoro,[5] kanakana[6] in the South Island, or wide-mouthed lamprey, is a species in the genus Geotria, which is the only genus in the family Geotriidae. [7] .

澳洲囊口七鰓鰻 （學名： Geotria australis）是 囊口七鳃鳗科 中的唯一物种 [3]。 分布于 南半球。 幼年时期在淡水中度过，成年后迁移到海洋中，然后回到淡水中产卵并死亡。

Primitive eel-like fishes with two dorsal fins near the tail, 7 pairs of pore-like gill openings, a mouth in the shape of an oral disc fringed with skin flaps and armed with many small, horny teeth, including spatulate lateral teeth, and eyes positioned on the side of the head.

We then provide information on the distribution, biology, ecology, genetics, threats, and importance of the five species, along with a timeline of the life phases of Geotria australis, one of the more well-characterized Southern Hemisphere lamprey species.

Medium sized, slender and elongated, with a scaleless, eel-like body. Adults are commonly 500–700 mm long in freshwater habitats (larger than the Short-headed lamprey). Two, low dorsal fins are situated well back on the body near the rounded …

Geotria is the only genus in the lamprey family Geotriidae. It has 2 known species: Geotria australis (pouched lamprey) and Geotria macrostoma (Argentinian lamprey).

The pouched lamprey (Geotria australis) also known as wide-mouthed lamprey, is the only species in genus Geotria, which is in turn the only genus in the family Geotriidae. It is native to the southern hemisphere. It spends the early part of its life in fresh water, migrating to the sea as adult, and returning to fresh water to spawn and die.

Found in mud burrows in upper reaches of coastal streams for the first four years of life until metamorphosis and subsequent downstream migration to the sea (Ref. 44894). Adults inhabit the sea for an undetermined period and are parasitic on other fishes. Migrate upstream which may last for 16 months and spawn in freshwater (Ref. 5154).

Join us, volunteer and be a part of our journey of discovery! The Pouch Lamprey is a jawless fish that has skin flaps around the mouth. Larvae (ammocoetes) live in mud burrows in the upper reaches of streams then migrate down to the sea after about 4 years. Spawning migrations of adults take them upstream into fresh waters.

2021年5月5日 · The pouched lamprey, Geotria australis Gray, 1851, has long been considered monotypic in the Geotriidae family with a wide southern temperate distribution across Australasia and South America. Recent studies have provided molecular and morphological evidence for a second Geotria species in South Ame …