### animal | vertebrate:

Lamprey
* All lampreys spawn in the spring on shallow gravel beds in freshwater streams.
* Many lampreys are parasites.
* Most lampreys are parasites that feed by clamping a round, jawless mouth onto a fish
  - become pests
* Most lampreys have eyes
  - larval phases
  - notochords
  - migrate to oceans
  - parasitize mammals
  - suck blood
* Most lampreys use gills
  - muscles
* Some lampreys attain maturity
  - sexual maturity
  - develop resistance
  - enter lakes
* Some lampreys have blotches
  - dark blotches
  - distribution
  - fins
  - wide distribution
* Some lampreys reach maturity
* are also a major threat to a healthy fish community
  - always eel-like in shape, but have neither paired fins nor scales
  - anadromous, like salmon
  - ancient fish that have characteristics similar to the first vertebrates
  - capable of regenerating spinal cord tissue and function
* are eel-like , scaleless animals
  - fish that suck blood from sports fish
  - found in both salt and fresh water, but hagfishes are strictly marine
* are jawless fish
  - fishes that look a lot like sucker-mouthed eels
  - vertebrates that have a long narrow body
  - long, thin fish that live in the sea, but swim up rivers to lay their eggs
  - mostly filter feeders as larvae and parasites as adults
  - no more closely related to remoras than they are to trout, or turtles or turtledoves
  - parasitic, feeding off of other fish and mammals
  - primitive, jawless fishes, lack paired fins, and have seven porelike gill openings
  - semi-parasitic and use their mouth to attach to other fish
  - slime-covered animals that resemble eels but lack bones
* are the earliest extant vertebrate to have adopted an osmoregulatory strategy
  - most basal group of vertebrates
  - thought to be an early offshoot on the evolutionary tree, before sharks and fish
* attach themselves to other fish and suck on their blood and body fluids
  - to host by suckers and feed upon blood and body fluids
* do exhibit Osmoregulation - they are anadromous fishes for the most part.
* feed on other fish and mammals
  - the blood of other fish species
  - upon fish with their suckers and breathe in and out of their branchial gill sacs
* frequently attack fishes, causing their death.
* go through four years of larval development before becoming adults.
* has-part organs.
* have a large sucking duck for a mouth and a well developed sense of smell
  - notochord as adults
  - sucker-like mouth that lacks a jaw
  - an amphitropical distribution and are restricted to relatively cold waters
  - differences
  - for a long time been used for food, particularly in Europe
  - no jaws, and their skeleton is cartilaginous
  - sucker mouths with rasp-like teeth and seven circular gill openings on each side
  - cell membranes
  - heads
  - pedal extremities
  - vertebrate feet
  - freshwater environments
* is an agnathan
* lack jaws.
* live in most of the world's seas and fresh water streams.
* live in salt and fresh water, and reproduce in fresh water
  - water and fresh water
* occur in temperate waters in both the northern and southern hemispheres.
* pass through an immature larval stage before metamorphosing into adults.
* possess cell types
* reach up to a length of four feet and as small as five inches.
* remain ammocoetes for a period of several years.
* reproduce in freshwater river beds, and bury their eggs about two centimeters underground.
+ Lamprey, Description: Vertebrates
  * Lampreys are eel-like, scaleless animals. They have well-developed eyes, one or two dorsal fins, a tail fin, a single nostril on top of the head, and seven gill openings on each side of the body. Like the hagfishes, they lack bones, jaws, and paired fins.

### animal | vertebrate | lamprey:

Adult lamprey
- notochords
* parasitize mammals.
* use muscles.

Male lamprey
* Most male lampreys have gill slits
* Some male lampreys have fins.