which type of sentence is this? mexican tetras, or blind cave fish, can see at birth, but their vision later…

which type of sentence is this? mexican tetras, or blind cave fish, can see at birth, but their vision later degenerates when skin grows over their eyes. simple compound complex compound - complex
Answer
Brief Explanations:
A compound - complex sentence has at least two independent clauses and at least one dependent clause. The independent clauses here are "Mexican tetras, or blind cave fish, can see at birth" and "their vision later degenerates", and the dependent clause is "when skin grows over their eyes".
Answer:
compound - complex