Class Agnatha
by there behavior and the way they look
the three main groups are that you gey(:
Jawless fish, cartilaginous fish, and bony fish.
The three main groups in science are chemistry,biology and physics.
Three basic fish groups: Cartilaginous Fish - Chondrichthyes Fay-Finned Fish - Actinopterygii (over 23,000 species) Lobe-Finned Fish - Sarcopterygii
nincompoop
The three major groups of fishes are:Jawless Fishes-have no jaw, but a roundmouth, a tube like body made of cartilage (flexible, like your nose), no scales; have slimy skin. Examples: lamprey and hagfish (google them).Cartilaginous Fishes-skeleton made of cartilage, movable jaws, have scales. Examples: sharks, skates and rays.Bony Fishes-skeleton made of bone, 95% of all fish species, covered by bony scales, have a swim bladder (helps fish keep balance), reproduce by external fertilization called spawning; some species have internal fertilization. Examples: perch, bass, northern pike, salmon, and goldfish.Thanks to SIS for the Life Science notes, taken on Friday, May 21st.-sylvesterrose12
To narrow it down to three groups, it would be strings, winds, and percussion.
It has three main groups.
star fishes live in alone and in groups
There are three main groups: Igneous, Sedimentary, and Metamorphic.
a school, or a shoal