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 eels are parasitic and feed on the blood and tissues of other fish by attaching to them with their suction-cup mouths. In contrast, hagfish are scavengers that primarily feed on dead or dying fish, as they lack jaws and instead use their slime-producing capabilities to access the insides of carcasses. While both have unique feeding strategies, neither actively hunts healthy fish like many other predators do.
Most fish are not jawless. There is a small group of very primitive fish called Jawless fish (Agnatha). However, they make up a very small proportion (<1%) of the fish species on earth. Jawless fish are things like lamprey and hagfish. All other fish, like trout, salmon, tuna, sharks, rays, cichlids, goldfish, etc, etc, have jaws. See the related link for more information on the primitive jawless fish.
all fish have fisn unless their fins wear down which is usally caused by sickness disease and or the levels in your tank if this happens i recommend keeping an eye on it . it could cause death and spread to your other fish. if you but a small little glass tank and put some medicine in their it will be fine
lamprey.
Lamprey are the only species of fish that do not have a jaw, or fixed appendages, unlike other fish. They suck nutrients and organs from other organisms.
From what I can find out there is absolutely nothing else in the world that is similar to a Hagfish. Check out this link :- http://en.wikipedia.org/wiki/Hagfish
A lamprey is a chordata. Lampreys belong to the subphylum Vertebrata within the phylum Chordata, as they have a notochord, dorsal nerve cord, and other characteristic features of chordates.
Yes, a lamprey does not have a jaw. Instead, it has a circular mouth with sharp teeth that it uses to latch onto and feed on the blood of other fish.
Lamprey eels are parasites so when they hook on to other animals they suck the animals blood. :P
All insects and other arthropods are invertebrates.
because all the other fish are jealous of them XD
Lampreys are not decomposers. They are consumers.