what does Anguillidae mean?

ANGUILLIDAE as NOUN

Meaning
- eels that live in fresh water as adults but return to the sea to spawn
Synonym(s)
- family Anguillidae (what does family Anguillidae mean?)
Hypernyms(s) Anguillidae is a kind of… Example: animal is a hypernym of mammal, plant is a hypernym of flower
- fish family (what does fish family mean?)