MeSH definition : Common name for the only family (Petromyzontidae) of eellike fish in the order Petromyzontiformes.
They are jawless but have a sucking mouth with horny teeth.;
Common name for the only family (Petromyzontidae) of eellike fish in the order Petromyzontiformes.
They are jawless but have a sucking mouth with horny teeth.