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Adult carnivorous lampreys are the most well-known species, and feed by boring into the flesh of other fish (or in rare cases marine mammals) to consume flesh and/or blood; [9] but only 18 species of lampreys engage in this predatory lifestyle [10] [11] (with Caspiomyzon suggested to feed on carrion rather than live prey [9]).
The sea lamprey (Petromyzon marinus) is a parasitic lamprey native to the Northern Hemisphere. It is sometimes referred to as the "vampire fish". In its original ...
Lampetra ayresii is a species of lamprey in the family Petromyzontidae.It is also called the river lamprey or western river lamprey.It is found in the eastern Pacific, specifically from Tee Harbor, Juneau in Alaska to the Sacramento–San Joaquin drainage in California, USA.
The Pacific lamprey (Entosphenus tridentatus) is an anadromous parasitic lamprey from the Pacific Coast of North America and Asia in an area called the Pacific Rim. [4] It is a member of the Petromyzontidae family. The Pacific lamprey is also known as the three-tooth lamprey and tridentate lamprey. Ammocoetes held by biologist in the Carmel River
Adult river lampreys measure from 25 to 40 cm (10 to 16 in) for the sea-going forms and up to 28 cm (11 in) for the lake forms. The very elongate body is a uniform dark grey above, lightening to yellowish off-white on the sides and pure white below. Like all lampreys, these fish lack paired fins and possess a circular sucking disc instead of jaws.
Studies that focused on closely related lamprey species (I. fossor) found that the guts of larval lampreys contained 97.9% organic detritus, 2.12% algae, and 0.09% bacteria. [6] After metamorphosis into the adult phase, southern brook lampreys do not feed but rely on stored fat reserves accumulated during the larval stage for energy and nutrients.
These lampreys may be beneficial to the rivers and lakes, due to their natural control of local fish populations. [5] Human populations can pose threats to these animals through pollution, siltation, and dredging. Larval lamprey must filter feed for numerous years and are vulnerable to changes in their environment during this time. For instance ...
The adult Arctic lamprey spawns in the gravel of riffles. The ammocoetes, as the lamprey larvae are known, are found in muddy freshwater habitats where they burrow in the mud and feed on detritus. It is generally an anadromous species, living in the ocean before migrating to fresh water to spawn, but some populations are permanent residents of ...