Multiple choice general knowledge

Which are the only Mammals on Earth that DO NOT drink water

  1. Dolphins and Whales

  2. Squids and Star Fish

  3. Octopus and Eel

  4. Shark and Sea Cucumber
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dolphins and whales obtain all necessary water from the metabolic water produced when digesting their prey (fish and squid), and from the water content in their food. They do not need to drink seawater directly, as their kidneys are adapted to handle the salt load. The other options list invertebrates (squid, starfish, octopus, eel, sea cucumber) or cartilaginous fish (shark), not mammals.

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