JH & LK

Phyla

Phylum is Chordata and subphylum is Vertebrata

Symmetry

Agnatha has bilateral symmetry.

Characteristic

• Cartilaginous skeleton• scaleless skin• anticoagulating saliva• Jawless• breathe with 7 external gills• No paired fins

Examples

Lampreys

Hagfish

Lampreys

• Lampreys live in coastal and fresh waters. It looks like eels. It has 7 external gills on the back of eyes. It has suckers instead of chins.

Hagfish

• Hagfish looks very thin and long. Usually, hagfish’s length is about 60cm. It doesn’t have chins. Instead of it, Hagfish’s tongues are well-developed.