I'm just going to put what fish their tail is based on instead of describing it because I'm lazy
Your mermaid self is a girl with shoulder length, bright purple hair, pale, almost bluish-colored skin, and a face covered with freckles. She has green eyes and a thin figure, and she wears an armor-style chestplate made from coral. Her tail resembles the shape and colors of a rivulated parrotfish, with green and blue scales.
Your mermaid self is a girl with long blonde hair, slightly tanned skin, and blue eyes. She wears a blue seashell bra and her tail resembles the shape and pattern/colors of a regal angelfish. The blue, yellow, and white stripes cover the entire length of her tail. She looks around 15-ish years old.
Your mermaid self is a girl with medium length pink-colored hair, pale skin, and brown eyes. Her tail resembles the tail of a pink skunk anemonefish, and she wears a pink seashell bra with blue flowers painted on it.
Your mermaid self is a merman with shoulder length silver hair, tanned skin, freckles, and gray eyes. His tail resembles the tail of a turquoise rainbowfish, and it's silver and blue colored. He wears a shark tooth necklace, and appear to be about sixteen years old.
Your mermaid self is a merman with short, red hair, tanned skin, freckles, and brown eyes. His tail resembles the tail of a clown loach fish, and he's around seventeen years old.
Your mermaid self is a merman with medium length black hair, pale skin, and blue eyes. His tail resembles the tail of a blue cichlid, and it's blue with black stripes. He looks about fifteen-ish and he wears a seashell necklace.
Your mermaid self is a girl with medium length mint-green hair, pale, bluish tinted skin, and magenta colored eyes. Her tail resembles the tail of a rainbow parrotfish, with mint green and pink scales. She's around thirteen or so years old, and she wears a top weaved from sea grass and a pink flower in her hair.