Sentences with phrase «jawless lampreys»
Today, only the jawless lampreys have four eyes.
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The jawless, blood - sucking sea lamprey found its way into the Great Lakes in the early 20th century through man - made canals, and has been disturbing the peace ever since.
Among animals alive today, only the jawless fish called a lamprey has both structures.
While the jawed vertebrate lineage spawned the majority of vertebrate life that exists on Earth today — «evolutionarily speaking, we are all bony fish,» says Gillis — lamprey and hagfish are the living remnants of a once extensive assemblage of primitively predatory jawless vertebrates.
When sea lampreys (Petromyzon marinus) mature, growing their jawless toothy gapes and sucking blood of other fishes, iron concentrations in blood drop — to about 10 times healthy human levels.