also called Orca, Blackfish

4 views: its portrait, and how it looks in the comparison photos.
About
The killer whale is the largest member of the dolphin family, growing longer than a full-size passenger van.
Despite its common name, the killer whale is actually the largest dolphin species on Earth. Adult males are generally larger than females and possess dorsal fins that can stand up to six feet tall on their own. Their massive size and thick blubber allow them to retain body heat in freezing polar seas across the globe.
From Wikipedia
The orca, or killer whale, is a toothed whale and the largest member of the oceanic dolphin family. The only extant species in the genus Orcinus, it is recognizable by its distinct pigmentation; being mostly black on top, white on the bottom and having recognizable white eye patches.
Read more on Wikipedia →Text from Wikipedia’s “Orca” article, CC BY-SA 4.0.
3 on the site
Weight
4.41 US tons (4 tonnes)
Quick answer
A killer whale measures about 23 feet (7 m) long, reaches 9.2 feet (2.8 m) tall, and weighs roughly 8,800 pounds (4,000 kg). That is about as heavy as three compact cars combined.
Typical figures, the same ones every comparison on the site uses; real ones vary.
More animals
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