Animals & Nature
Whales & Dolphins Quiz
How well do you know the giants of the sea? Test your knowledge of whales, dolphins, and cetacean biology.
How well do you know the giants of the sea? Test your knowledge of whales, dolphins, and cetacean biology.
Whales and dolphins belong to the order Cetacea — a group of marine mammals that evolved from land-dwelling ancestors over 50 million years ago. From the blue whale, the largest animal ever to live on Earth, to the clever bottlenose dolphin, these creatures continue to fascinate scientists and wildlife enthusiasts alike. This quiz draws from a pool of 50 questions covering species identification, biology, behavior, and conservation.
Each round presents 10 randomized questions from our pool of 50, so every playthrough offers a different challenge. Pick from four multiple-choice answers, get instant feedback with detailed explanations, and share your score to see how friends compare.
Questions span whale and dolphin species, echolocation, baleen versus toothed whales, migration patterns, pod structures, hunting strategies, the history of commercial whaling, and modern conservation efforts. You might discover that orcas are technically dolphins, that sperm whales can dive to over 7,000 feet, or that bowhead whales can live for more than 200 years.
The blue whale is the largest animal ever known to have existed -- larger than any dinosaur. Blue whales can reach lengths of up to 100 feet (30 meters) and weigh as much as 200 tons. Their hearts alone weigh about 400 pounds, and a blue whale's tongue can weigh as much as an elephant. They feed almost exclusively on krill, consuming up to 4 tons per day.
Despite being commonly called "killer whales," orcas are actually the largest members of the oceanic dolphin family (Delphinidae). They can reach up to 32 feet in length and weigh up to 6 tons. Orcas are apex predators found in every ocean, and different populations specialize in hunting fish, seals, or even other whales.
Some whale species are among the longest-lived mammals on Earth. The bowhead whale holds the record, with some individuals estimated to be over 200 years old based on amino acid analysis of eye lens proteins. Humpback whales typically live 80-90 years, while blue whales can reach around 80-110 years. Scientists believe cold Arctic waters and slow metabolisms contribute to the bowhead's extraordinary lifespan.
Last updated: March 2026