a Hangfish has:
a single nostril at the tip of its snout
and has sensory tentacles around its mouth
as well as slime glands and 1 pair of gill openings.
A Lamprey has :
a mouth lined with teeth
a single nostril at the top if his head
7 pairs of gill openings
and no slime glands
These two fishes are considered jawless fishes and represent on of the earliest developments in vertebrates.
The jawless condition.
Hagfish and lampreys.
The lamprey the hagfish and the worm
bony jaws
the fins.
lobe-finned fish
Agnathas are a class of jawless fish in the phylum chordata. The group includes species such as hagfish and lamprey.
Hagfish and lampreys are apart of Agnatha which means jawless fish. Hagfish are a parasite fish but can be free swimming. Both jawless fish will feed on carcasses on the bottom of the seafloor.
Lamprey, hagfish suck body fluids from the host fish after rasping a hole in the side of the body.
Plenty! eg. sharks, lamprey, hagfish, worms, flat worms, sponges, snails, octopus.....
Agnatha is a superclass of the phylum Chordata. It contains the jawless fish. Two common examples of this would be the lamprey and the hagfish.
Lampreys are in the superclass Agnatha, jawless fish. They are of the class Cyclostomata, which includes hagfish, as opposed to the extinct Ostracoderms.
Yes, lampreys are jawless fish. So are hagfish. Lampreys and hagfish have slender, eel-like bodies without scales. They do not have paired appendages, and, of course, they lack jaws. They have cartilaginous skeletons and often do not have vertebrae.