Description
This lamprey is the most common of the northern European species and is also the smallest. Adult brook lamprey measure from 12-14 cm. The very elongate body is dark blue or greenish above, lightening to yellowish off-white on the sides and pure white below. Like all lampreys they lack paired fins and possess a circular sucking disc instead of jaws. They have a single nostril and seven gill openings on either side.
Read more about this topic: European Brook Lamprey
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