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In British folklore, the monster known as the Lambton Worm may have been based on a lamprey, since it is described as an eel-like creature with nine eyes. [citation needed] In Japanese, lamprey are called yatsume-unagi (八つ目鰻, "eight-eyed eels"), thus excluding the nostril from the count. [citation needed]
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
Larvae of all lampreys are called ammocoetes and when small ABL ammocoetes have a dark band running longitudinally along the body, a dark head region, and the remainder of the body is clear. As they increase in size the body becomes increasing darker, reaching a dark brown by the time the ammocoetes reach their maximum size of about 250 mm (10 in).
The western brook lamprey and river lamprey have been considered a clade separate from the other western U.S. lamprey species. [12] However, more recent genetic research suggests the western brook lamprey would be better categorized as a member of a Lampetra ayresii species complex. [ 11 ]
Studies have found that the digestive tract of the lamprey actually shrinks and becomes functionally useless as larval lampreys enter the adult stage. 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]
This lamprey is usually about 13 to 32 centimetres (5.1 to 12.6 in) long, but specimens have been known to reach 63 centimetres (25 in) and 200 grams (7.1 oz) in weight. Non-anadromous individuals are rarely over 18 centimetres (7.1 in) long. [4] It is brown, gray, or olive in color with a paler belly. There are two dorsal fins located near the ...
The Ohio lamprey (Ichthyomyzon bdellium) is a lamprey found in the Ohio River drainage basin in the United States and is a parasitic species of lampreys. They are considered to be an endangered /rare species in some states, due to siltation , pollution , and construction of dams .
Northern brook lamprey are considered non-parasitic lamprey. [5] They have poorly developed teeth and a round, disc-like, subterminal mouth, called an oral-disc, for suction. Northern brook lampreys have a single dorsal fin that continues along their entire length until it connects with the caudal fin. [6] This dorsal fin can be notched as well.