Whales & Dolphins, Ranked

At up to 30 meters and 180 tonnes, the blue whale is the largest animal known to have ever existed — its heart is among the largest of any animal, the one preserved specimen weighing close to 200 kilograms.

The orca is the sea's top predator, hunting in sophisticated cultural pods with dialects and strategies passed between generations — technically the largest dolphin.

Famous for hauntingly complex songs that evolve across populations and for spectacular full-body breaches, the humpback is the most beloved whale-watching star.

The largest toothed predator on Earth, it dives over 2,000 meters to battle giant squid and possesses the biggest brain of any animal — immortalized as Moby-Dick.

The world's most familiar dolphin, renowned for tool use, self-recognition, and signature 'name' whistles — a benchmark for animal intelligence.

Its spiraled tusk — actually a sensory tooth up to 3 meters long — made this Arctic whale the source of medieval unicorn-horn legends.

Ghostly white with a flexible melon-shaped head, the beluga is so vocal it earned the nickname 'sea canary' and is unusually expressive among whales.

It undertakes one of the longest migrations of any mammal — up to 20,000 km round trip — and 'friendly' individuals famously approach boats in Baja lagoons.

The second-largest animal on Earth after the blue whale, this sleek, fast swimmer can reach 27 meters and cruise at high speed.

The longest-lived mammal known, with individuals estimated at over 200 years old, its massive skull can smash through thick sea ice.

One of the world's most endangered large whales, with only a few hundred left, distinguished by callosities on its head and a heartbreaking conservation story.

The largest river dolphin, its striking pink hue and folkloric 'boto' legends make it one of the most distinctive cetaceans of the Amazon.

A large, highly social dolphin that lives in tight-knit pods, famous for strong family bonds — and, tragically, for mass strandings.

Named for its dazzling habit of leaping and spinning several times in mid-air, it's one of the most acrobatic small cetaceans.

The smallest of the great rorquals and among the most abundant, curious minkes will sometimes approach vessels closely.

With a striking hourglass flank pattern, this fast, gregarious species travels in superpods that can number in the thousands.

The smallest porpoise and most endangered marine mammal, with likely fewer than a dozen left — famous chiefly for being on the brink of extinction.

The Yangtze river dolphin was declared functionally extinct in 2007, the first cetacean driven to extinction by humans in modern times.

One of the fastest whales, capable of over 50 km/h, yet far less famous than its blue and humpback cousins and heavily depleted by whaling.

Recognizable by heavy white scarring from squid prey and rival bites, this deep-diving dolphin is striking but rarely seen close to shore.