school of something big

[new aces]

I saw something I have not seen and coming to you guys for answers. I was with my bro in law and nephew. I was under the causeway going toward jetties. We saw a school of fish on top. Saw long tail fins coming out of the water. Had my bro in law get me close and casted in front of the school. Got on one and handed to my nephew. Bout spooled him running away. Then broke off. Acted like a jack, but never seen a school like that up top?

[SCHU]

Jacks usually blow up on bait, did you see color of the tails? Tarpon, maybe? Never seen school of fish likebthat.