Same thing happened to us (but it was Dolphin). We were about 120 miles offshore of FL and in these square waves the gulf is known for in a northern. Woke up the next morning to watch dolphin eye to eye with us as the waves passed under. It was almost like you could reach out and touch them. We tried shooting pictures of it but the camera was caoted with sea spray and they came out terrible!!
Funny thing was that on our way back from the Tortugas, we had to motor the whole way!!!! Flattest seas I have ever seen. It was like a swimming pool.
Here is the ride back... look at how flat those seas are!!!
Picture perfect memory.