Thermokinesis is the ability to manipulate temperature, usually to generate heat.
Hydro-Thermokinesis
Hydro-Thermokinesis is the ability to heat water, whether to boiling or evaporation. It is associated with the element of fire, and a popular mermaid power, particularly since it can be used to dry off one's tail rapidly.
Known Users
- Aeryn (Legend of the Mermaid!)
- Aka Hayes (My Inner Mermaid)
- Amelia (Tail of Two Mermaids)
- Alex (Mermaid Magic)
- Alexa Santamaria (Mermaid Masters; lost in Season 5)
- Alexia (The Language of the Waves)
- Alexis "Lexi" (The Magic Shell)
- Ali Harris (Spell Bound Tails)
Boiling Water
- Alice (Twins of the Atlantic)
- Alisa (The 2 Tails Mermaids)
- Allie (The Very Important Secret)
- Alyssa (Get Off My Tail; lost in Season 1 finale)
- Alyssa (The Lives of the Secret Mermaids)
- Amanda (A Hard Mer-Life)
- Amanda (The Secret Life of a Mermaid)
- Amelia Coudroy (The Secret Scales)
- Amy Samuels (Secret Life of a Mermaid; lost in Season 3)
- Andy Carter (The Tale of a Tail; lost before Season 2)
- Angela (Secret of the Scales)
- Annelise (Our Scaly Secret)
- Ashley (The Magic of Mermaids)
- Avery (A Tail of 3 Mermaids)
- Bailey (Secret Tale of a Mermaid)
- Bay Patterson (True Blue)
- Bella Chadwick (The Crazy Mermaid Life)
- Bella Wilton (The 2 Secret Tails)
- Bella (Mermaid Powers)
- Bella (Mermaids at Midnight)
- Bella (Out of the Sea)
- Bella (Water + Magic = Tail)
- Bianca (Unnaturally Fishy)
- Blaire (The 2 Silver Tails)
- Brenna Edwards (Secret Life of a Mermaid)
- Bridget (Secret Life)
- Britney (Our Scaly Sister Secret)
- Britney (The Waves)
- Brittney (Mermaids Forever)
- Brook (Secret Scales; gained in Season 1 Episode 4, lost in Season 1 Episode 4)
- Brooke (Modern Mermaids
- Brooke (Secret Life of a Mermaid)
- Brooklyn (The3mermaidfins)
- Brynn (Water Wonders)
- Caroline (Mermaid Magic)
- Cassie (Our Fantastic Life as Mermaids)
- Charlotte (No Ordinary Secret)
- Chelsea (Fish Freaks)
- Chloe (Scales)
- Chloe (The Very Important Secret)
- Chris (Secrets of the Sea)
- Christina (Mermaiden Sisters)
- Christy Waters (A Mermaid Tail)
- Claire (4 Tails)
- Claire Lewis (Mermaid Magic)
- Claire (Secret Mermaid Life)
- Cleo (Scale Tails)
- Cora (Mermaid Magic)
- Cora (The 3 Mermaids of the Blue)
- Crystal (The Mermaid)
- Dasia (Pink Tail)
- David (Mermaid Magic)
- Desdeny (A Mermaid's Life)
- Devion (Pink Tail)
- Dylan King (A Mermaid's World)
- Dylan (Truly H2O)
- Elizabeth (Fishy Secrets)
- Elizabeth (Just Being Mermaids
- Ema (Our Mermaid Life)
- Emily (Mermaid Powers)
- Emma (The 2 Tailed Mermaids)
- Emma (Mermaid Waters)
- Emma (Missouri Mermaids)
- Emma (The Two Tails)
- Enna (Tails)
- Erica (The Ocean Potion)
- Erin (Creature of the Deep)
- Evelyn (The Last Mermaids)
- Faith (Twins of the Atlantic)
- Ginger (Twisted Tails)
- Hailey Holt (The3mermaidfins)
- Hailey Smith (Mermaid Masquerade)
- Hayley (Moonstruck Mermaids)
- Heather (Mermaid Magic)
- Isabella (Mermaid Island)
- Izzy (A Splashy Tale)
- Jackie Sky (The 3 Tails)
- Jackie (The Scaly Secrets)
- Jake (Mermaid Secret)
- Jenna (Mermaid Secrets)
- Jenny (The Scales)
- Jessica (My Magical Secret)
- Jessica (My Magical Secret Mermaid Life)
- Jessica (Our Mermaid Life)
- Jessica (Secret Mermaid Diary)
- Jewel Adams (Tail of a Mermaid & Merman)
- Jordan Stoner (The Tale of a Tail)
- Justin (Fin Fun Mermaid Adventures)
- Justin (Mermaid Scales)
- Katherine (The Siren's Tale)
- Kelsey (Tail of Two Mermaids)
- Kaylee Houden (Mermaid Masters)
- Kayley (Secret Life of a Mermaid)
- Kira (Kira the Mermaid)
- Kourtney (The Mermaid Tales)
- Kristie (Neptune's Mermaid)
- Kristina (My Best Friend is a Mermaid)
- Ky (Make Waves)
- Kylie (The Secret Tails)
- Laura (A Secret Mermaid Life)
- Lauren (Our Scaly Secret; half-mermaid)
- Leah (Leah's Mermaid Days)
- Leah (My Mermaid Lifestyle)
- Lelia Crystal (Magic Tails)
- Lillian Burgess (My Life as a Teenage Mermaid)
- Lilly (Mermaid Shells)
- Lily (The 2 Tails
- Liz (Mermaids; lost in Season 2)
- Lucy (Want to Know My Secret?)
- Lynn (Scales and Tails)
- Maci (Magical Mermaids)
- Macy Stevens (Sea Stars)
- Maddie (Magical Mermaids (Emma McCullough); temporary)
- Maddy (Our Little Secret)
- Madison (Mermaid Magic)
- Makenna (Tails of the Sea)
- Mary Roberts (Once Upon a Mermaid)
- Max H. (Splash of a Merman)
- May (Magic Tails)
- Maya (H2O Mermaids)
- Maya (Mermaid Maya)
- McKenna (Mermaid Magic)
- McKenna (Under Sea Secret)
- Melissa (Italian Mermaids)
- Merlena Sef (The3mermaidfins)
- Michaela (Mermaid Mysteries)
- Nathalia Ramos (Mermaid Secret)
- Nikki (Mermaids of Atlantis)
- Nikki (Scales and Shells)
- Nikki (Shorts 'n Scales a Mermaid Tail)
- Olivia (The Ones with the Tide)
- Paige (Imperfect)
- Philip (Secret life of a Merman)
- Tetra Chadwick (Fire Ice Just Add Water)
- Rachel (My Best Friend is a Mermaid)
- Raquel Berrconsin (Strange Life of the Mermaids)
- Reeva (Ocean Mermaid)
- Rikki (A Mermaid Tale)
- Rikki (Secret Life of the 2 Mermaids)
- Roxanna (Tails in the Sea)
- Samantha (Mermaid Wishes)
- Samantha (My Secret Mermaid Life)
- Serina (Secret Scales Forever)
- Skyler (Our Mermaid Life)
- Sofia (Magical Life)
- Sophie Pope (The Scale Sisters)
- Stacey White (Strange Life of the Mermaids)
- Summer (Secret of the Sea)
- Sydney (Mermaid Magic)
- Tasha (The Mermaid Tales)
- Taylor (Secret Tale of a Mermaid)
- Taylor (The Tale of a Tail)
- Taylor Waters (Magic Tails)
- Tess (My Mermaid Life)
- Tessa (Moon Tails)
- Trinity (Secret Scales)
- Yasmin (The Mermaid Tails)
- Zoie (The H2O Sisters)
- Zuri Rico (Sea Girl)
- Rachel Mercury (Mermaid Drops)
Boiling Water
Pyrokinesis
The ability to generate fire; typically used as an "upgrade" of Hydro-Thermokinesis.
Known Users
- Aeryn (Legend of the Mermaid!)
- Alsie (Too Many Secrets)
- Aly Fisher (One Different Secret)
- Bella (Water + Magic = Tail)
- Brenna Edwards (Secret Life of a Mermaid)
- Cassie (Texas Tails)
- Claire Brooks (Under the Spell)
- Charlotte (No Ordinary Secret)
- Chloe (Our Mermaid Secret)
- Dawn (Mermaid Secrets)
- Hayley (Moonstruck Mermaids)
- Jenny (The Scales)
- Jessica (My Magical Secret Mermaid Life)
- Jewel Adams (Tail of a Mermaid & Merman)
- Justin (Mermaid Scales)
- Krystal Flare (Forever Scales)
- Leah (Leah's Mermaid Days)
- Liz (Mermaids; lost in Season 2)
- Loala (Tail Us Bout It)
- Lola (Tail of a Mermaid)
- Lucy (The Calling of the Ocean)
- Macy (H2O Magic)
- Macy Stevens (Sea Stars)
- Michaela (Mermaid Mysteries)
- Rachel Mercury (Mermaid Drops)
- Roxanna (Tails in the Sea)
- Ruby (Living with a Secret)
- Stephanie (My Watery Secret)
- Tessy (Mermaids)
- Trinity (Secret Scales)
- Zoey ((My Splash Side)