Agnathan means a jawless fish. There are many different types of agnathans, and each one has a different weight.
The main difference between Agnathans (jawless fish) and Chondrichthyes (cartilaginous fish) is the presence of jaws. Agnathans lack jaws, while Chondrichthyes have well-developed jaws. Additionally, Agnathans have a cartilaginous skeleton, while Chondrichthyes have a skeleton made of cartilage.
it is in the water
agnathans
parasitism, pineal (sp?)(third eye).
That is the scientific designation for " jaw-less fish. "
Gill supports
Yes , since a hagfish is a Agnathan and all Agnathans are ectothermic .
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