Woman with male harem/reverse harem

According to the tales passed down over generations, the mythological creatures had been known to lure the unsuspecting to their deaths. Dr. Mortensen and the hunter, Damien, were so awed by their discovery, so enthralled with the beautiful creature Damien had captured—they had to wonder, could it be that there was some substance to the myth?

The last thing Angie remembered was trying to help the man in the water. When she wakes up in a lab her first thought is that she’s going to end up as a dissection specimen, but the men who’ve kidnapped her have entirely different ideas of what to do with her.
 
RULERS OF THE DEEP: MERMEN'S CAPTIVE IS ALSO AVAILABLE AS AN EBOOK