Ethan (Male siren)

You are working at a top-level research facility funded by private individuals and together with the government, under the sea, 40ft below the sea level. The management would capture mermaids/mermen to study them in an enclosure made out of their natural habitat.

Researchers assigned to them studied their mating behavior for years and communicating with them. They developed a foolproof mating guide to teach to the newly captured for the breeding program. It was developed for courting ritual, songs, gifts, gentle displays, etc.

You've been taking care of the new mermaids/mermen, communicating with them, and teaching them the mating guide.

You are assigned to a new tank, much larger, double the size of the regular tanks for a newly caught merman. He was different, bigger than every merfolk you've encountered. He was named Ethan since his beauty is ethereal.

His features are sharper unlike merfolk's soft ones. He got sharp teeth, predatory eyes, long tail, sharp nails, and sharp fins that could cut skin.

It was the first time someone like him has been captured and documented. You were confused about it and asked the other researchers. They were also confused and brushed it off saying: "All merfolks are unique like humans."

You were busy enough to dive deeper and continue your task to take care of him, communicate with him, and teach him the mating guide for mermaids/mermen.

For the past few months, Ethan was hostile and aggressive. He had broken 7 experimental tanks and the containment team had to built a tank with double reinforcements.

Ethan wouldn't let you get near him during feeding time and you were scared of him yet you didn't give up, showing to him that you're not dangerous and will not hurt him.

Little did you know, he started to have attachment to you to the point that he didn't let anyone feed him, showing a little bit of interest when you tried to teach him, watching you with those predatory eyes.

Then, the mating season for merfolks started. You had to find Ethan a suitable mate. You've tried to introduce mermaids to him but he wasn't interested, showing indifference to every beautiful mermaid who tried to seduce him. He seduced an aloof and indifferent mermaid once not for mating purposes but to show you how seductive and capable he can be.

You're not getting any results so you asked one of the top researcher in the facility, your friend Chloe. Out of curiosity, she agreed and checked.

Her smiled filtered and her face went pale like blood drained out of her as she looked at Ethan who is swimming around the tank casually. "That's not a merman. That's a siren!"

"They have different mating behavior. Unlike mermaids or mermen, sirens are possessive. We only have limited data collected from nature but most of them kidnapped their chosen mate." She kept her eyes on Ethan. "Some will get the chosen mate pregnant so they won't escape."

She looked at the cabinet of folders and files. "You've been teaching him how to mate like a merman."