welcome to nc mermania. yep, this is a mermaid convention.diving in for a weekend of fun, flare, and fins. >> being a mermaid means being the bridge between under water and reality. >> here we go back to the big pool. >> these die hards are making waves wowing in tails that can cost up to $5,000 unique hobby. it was daryl hannah who first made a flash. >> what are you doing, sweetheart? >> taking a bath. >> can i come in? >> no. >> then it was aerial's turn as the little mermaid. ♪ under the sea. >> now it's hannah's who says for her it's about pushing fun and fantasy. >> these are one of my favorite part of my room. they are handmade by me, jelly fish lanterns. >> met the 21-year-old art and design student at her college in virginia. >> this is fish netting that i got that actually make tops with. >> although hours away from the ocean, she's found a way to bring the sea to her. >> here is a jar of sand from the outer banks which i collected myself. this room is kind of like, my roommate >> hannah teaches with instagram followers. she's quick