Freediving seems to attract quite a lot of pretty girls and there are several professional models and actresses who did competitive freediving. Well there are many pretty guys certainly too, but I am not the right person to judge it.
Besides those names already listed earlier in this thread, there are also many beautiful girls and women both in DB and in many freediving clubs. From the more mediated and most famous ones, I think Tanya Streeter was not mentioned yet, and I believe she deserves it:
Back to Mehgan Heaney-Grier is a US actress (i.e. Abyss), model and freediver. This is one of Mehgan's photos in her
ApneaMania profile. There are more of them, and some clips also on
Mehgan's nice website.
Another Russian modeling and freediving beauty besides Marina Kazankova, is Yulia Petrik, owner of the Russian freediving website
HomoDelphinus.ru:
There are some more photos in the
galleries on her website
Tanya, Mehgan, and Marina are all holders of freediving world records. And as well other women from the top of the top are very attractive - like the already mentioned Audrey, Deborah Andollo, and certainly many others I forgot. I recommend you go to ApneaMania.com and browse through the profiles of top freedivers - there are many pretty women (and men) there - I'd tell more than in many other sports.