Marine Life Quiz: 15 Questions on the Oceans
The oceans cover more than 70% of the Earth's surface and are home to extraordinary biodiversity. From coral reefs to the abyss, do you know the secrets of marine life?
🏅 Best score: –
Frequently asked questions: Marine Life
Here is a preview of what awaits you in this marine life quiz: 15 multiple choice questions, each with a detailed explanation so you can learn while you play. Below are a few sample questions (and their answers, so no peeking before you play!).
What is the largest animal that has ever existed on Earth?
Answer: The blue whale. The blue whale is the largest animal that has ever existed, even bigger than the largest dinosaurs. It can grow up to 30 metres long and weigh 170 tonnes, the weight of 25 elephants.
What percentage of the oceans remains unexplored?
Answer: About 80%. About 80% of the oceans remain unexplored and not mapped in detail. The abyss, below 6,000 metres, is one of the least known environments on our planet.
How do dolphins mainly communicate with each other?
Answer: With clicks and whistles (echolocation and vocalisations). Dolphins communicate mainly through clicks, whistles and ultrasounds. Each dolphin has its own unique signature whistle, comparable to a name. They also use echolocation to locate their prey.
What is the largest fish in the world?
Answer: The whale shark. The whale shark is the largest fish in the world, reaching up to 18 metres long and weighing over 20 tonnes. Despite its impressive size, it is a harmless animal that feeds by filtering plankton and small fish.
Which giant deep-sea cephalopod, long thought to be a myth, can reach 13 metres in length?
Answer: The giant squid. The giant squid (Architeuthis dux) can measure up to 13 metres long, tentacles included. Living in the abyssal depths, it was not filmed alive for the first time until 2004. Its eyes, among the largest in the animal kingdom (25 cm in diameter), let it see in the darkness of the deep.
Fancy another challenge? Discover all our free science quizzes or browse the latest quizzes. And to go from theory to practice, explore our science kits at Science Gifts.