We snorkeled with humpbacks around Moorea' in October 2021 and folks on our trip had all manner of fins.....
Some had typical booties and heel strap fins, one photographer had long free dive fins. My wife uses black slightly stiffer full foot Scubapro Monprene split fins. I used (and still do) the Cressi Rondine modern made copies rubber fins labeled as Oceanways Aquapro fins.
As I've aged I like a little softer fin. The short blade and natural rubber Oceanways Aquapro suits me and my diving. They're also are a bit wider, you know, like the human foot is at the front!
Despite wearing a wide 8.5 shoe I buy these fins in size 10-12 and use a 1.5m neoprene bootie to fill in the space. This is way more comfortable for me versus having any pinch or discomfort.
Mares fins have all manner of blade stiffness in their various models. Most are good but are a combination of soft foot pocket with some plastic in the blade. I simply don't enjoy them as much.
When I was younger and ran (my one marathon; 3:27) I used the Mares Avanti L long blade fins and loved them. These days the length and thrust of rubber is more than enough for me even in scuba gear around the world.
One Mares recommendation might be the Mares Volo Race fins. The pivot type blade is easy on knees but more than enough "oomph" to push you through the water.
You will be doing more "swimming" and sometimes in sprints to get to a resting whale waiting for it to slowly rise and breathe. You can't out swim a whale no matter what fins you have on LOL......
Tahiti requires the boats drop you 100 meters (300 yds) or so away. Diving down is pretty much prohibited even though we had some other boats drop idiots who did that and scared away the whales a couple times
They got yelled at by their guides but people being people get excited. I think if you simply exhale a bit and drop down feet first to 5' or less is ok most of the time. They just want all to be respectful of the whales and not make them keep moving versus resting.
My recommendation is get some mid-length slightly soft full foot fin. As mentioned the Mares Volo Race but go up a size or two and get neoprene socks.
All closed heel shoe fins are MUCH more streamlined than boots and heel strap fins especially for an activity like open ocean snorkeling in my opinion.
It is truly an amazing experience!
David Haas
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