I feel like I've asked this before, but anyhoo....

Did you ask Thundr via email at Apex's site? He's probably got the best data on that.

Yeah, he said the Crash scent, which I believe I've tried, via MX3. Was not aquatic to my nose.

None of the scents I sampled from thundr seemed aquatic to me, either. If you're looking for an aquatic cover, what about using The Fragrance Shoppe to get a fragrance you like, and adding it to your mones? I think Snoopyace detailed how to do this in another thread here.