Smolder is showing off her sporty one-piece swimsuit worn under all those clothes she's wearing on the beach for some reason (possibly to make it a surprise), Ocellus being a young woman now is still all for modesty with her cute little one-piece underneath her overalls and shirt, Silverstream is pretty much unabashed in getting them shirt/shorts off and into her two-piece, and Skystar being likewise by relieving her cute shorts and camisole blouse to make public of her (also) cute and sexy shell-bra bikini. I know Skystar and Silverstream could change into their seapony form when in the water, but I like to think they'd remove their swim-bottoms first and put em in a safe place temporarily.
Again, I wish I could've added in Gallus, Yona, and Sandbar maybe. But that would've acquired more time and effort and attention-spans to spend, and I'm kind of already over it. But maybe Gallus will have a second chance next time. Same with Queen Novo perhaps, or anymore Hippogriffs that stuck out to me (even an OC one, I don't know).
I would consider this an End of Summer tribute given it's late September, but I'm already looking forward to Autumn now that it's cooling off where I'm at. Plus, I do this sort of schtick all the time.