Fish in the New Testament means men.
Let's get real...the original inspiration of ANY fish in ANY Post Jewish Scripture was from the Torah.
The Jews in the desert kept bitching about how they missed the fish they used to eat in Egypt.
And there's one thing we know for sure, TNT NEVER skips a chance to plagiarize ANYTHING it can from the Torah.
Even one of your top scholars , Gamaliel, referred to men as fish,

Since the Hillel school of thought is presented collectively, there are very few other teachings which are clearly identifiable as Gamaliel's. There is only a somewhat cryptic dictum, comparing his students to classes of fish:
A
ritually impure fish: one who has memorised everything by study, but has no understanding, and is the son of poor parents
A ritually pure fish: one who has learnt and understood everything, and is the son of rich parents
A fish from the
Jordan River: one who has learnt everything, but doesn't know how to respond
A fish from the
Mediterranean: one who has learnt everything, and knows how to respond
Gamaliel - Wikipedia, the free encyclopedia