Are all fish cold-blooded?

It is not exactly true that all fish are cold-blooded.

The Opah, or Moonfish, is the only known endothermic (“warm-blooded”) fish, and can keep its entire body 5 °C warmer than its environment. : r/Awwducational

Blue Fish Cold-blooded Vertebrate Animal With Caudal And Dorsal Fins, Nostrils Soft Ray, Uncooked Fresh Organism Isolated On Vector Illustration Royalty Free SVG, Cliparts, Vectors, and Stock Illustration. Image 109501540.

Meet the Comical Opah, the Only Truly Warm-Blooded Fish

Top 10 Fastest Fish in the World

Are all fish cold-blooded? - Quora

First Warm-Blooded Fish Discovered

Fearsome megalodon was likely warm-blooded

Opah Fish Science with Nick Wegner - B-Roll: Fish & Sharks - NOAA Fisheries Video Gallery

Kona Deep Sea Fishing, Big Island Fishing

Fishes are Cold Blooded Animals in the World that are Covered with Scales and Equipped with a Pair of Fins To Swim in the Water. . Stock Illustration - Illustration of aquarium

First Warm-Blooded Fish Discovered

Dormancy - Cold-blooded, Vertebrates, Hibernation

First In Fish: 'Fully Warmblooded' Moonfish Prowls The Deep Seas

Not all fish are cold blooded – science tells the story of the warm-blooded opah fish