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The southern brook lamprey encounters a wide range of predators in its natural habitat. [7] The eggs of adults are preyed on by various species of fish and crayfish. [8] Southern brook lampreys in the larval stage serve as prey for a wide range of fish and bird species. [8]
The brook lamprey is a common, non-parasitic species that is endemic to Europe. [1] Adult brook lampreys measure from 12 to 14 cm (4.7 to 5.5 in). The body is highly elongated and dark blue or greenish above, lightening to yellowish off-white on the sides and pure white on the ventral side.
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.
The eggs of the American brook lamprey (ABL) are white, sticky, and small, measuring about 1 mm (0.04 in). When they hatch, the embryos are small as well, measuring less than 5 mm (0.20 in); they are white and wormlike. Within a month they take on the larval appearance.
Mordacia is a genus of lamprey, the sole genus of the family Mordaciidae, also known as the southern topeyed lampreys. The family Mordaciidae is most closely related to the lamprey family Geotriidae , which has a similar Gondwanan distribution, and both families diverged during the Early Cretaceous .
There are currently six recognized species in this genus: [2] Ichthyomyzon bdellium (D. S. Jordan, 1885) (Ohio lamprey) Ichthyomyzon castaneus Girard, 1858 (Chestnut lamprey) Ichthyomyzon fossor Reighard & Cummins, 1916 (Northern brook lamprey) Ichthyomyzon gagei C. L. Hubbs & Trautman, 1937 (Southern brook lamprey)
This species is anadromous. This parasitic lamprey can reach a length of 54 centimetres (21 in) SL. Ammocoetes and adults of this species are found in rivers, and occur in fine sand along river banks. [3] The life cycle of a Mordacia lapicida is divided into three life stages: freshwater rearing, an ocean parasite and an adult spawning stage. [4]
Lampetra is a genus of lampreys in the family Petromyzontidae.. Phylogenetic studies indicate that this genus as presently defined is polyphyletic, with species of this genus from western North America forming a clade that forms the sister group to Lethenteron, Eudontomyzon, and Lampetra sensu stricto (eastern North American and European species).