General knowledgeAsked by Anonymous22 Oct 2026, 12:45 PM ISTUpdated
In one line
Dolphins and whales eat fish, squid, and sometimes tiny sea animals, depending on their type.
Dolphin — Informal classification of marine mammals, closely related to whales and porpoises A dolphin, which eats fish and squid in the ocean. Image: WikipediaBlue whale — Species of whale; largest animal known A blue whale, which eats tiny krill by filtering water. Image: Wikipedia
Let's understand it simply
Imagine you are at a big buffet. Some people like rice, some like roti, and some only want sweets. In the ocean, dolphins and whales also have their own favourite foods. Dolphins usually hunt for fish and squid, like how you might look for your favourite snack. Some whales eat big fish, but others eat tiny animals called krill (they look like small prawns) by taking a huge mouthful of water and filtering out the food, just like using a sieve to separate tea leaves.
How it works
Dolphins use their sharp teeth to catch fish and squid.
Some whales, like killer whales (orcas), hunt fish, seals, and even other whales.
Baleen whales (like blue whales) have special plates called baleen instead of teeth.
These whales open their mouths wide, take in water full of krill and plankton (tiny sea creatures), then push the water out, trapping the food inside.
They swallow the trapped food.
Where you see it in real life
A dolphin chasing a school of fish in the sea → Dolphins use teamwork to catch fish.
A blue whale swimming with its mouth wide open → It is filtering krill from the water.
An orca (killer whale) hunting seals on ice → Orcas eat bigger animals, not just fish.
Dolphins at a marine park being fed fish by trainers → Shows their natural diet.
Fishermen sometimes see dolphins following their boats → Dolphins are looking for easy fish to catch.
Why it matters
Knowing what dolphins and whales eat helps protect their food sources in the ocean.
It helps scientists understand the ocean food chain (who eats whom).
It shows how pollution or overfishing can harm these animals if their food disappears.
Common mistakes
Thinking all whales eat only fish: Many whales eat tiny krill, not fish.
Believing dolphins eat plants: Dolphins are carnivores (they eat only animals).
Mixing up dolphins and whales: Dolphins are a type of whale, but their diets can be different.
Remember it
Dolphins eat fish and squid; big whales eat tiny krill or big fish, depending on their type.
Check yourself
What do dolphins usually eat in the ocean?
Fish and squid, because they are carnivores.
How do baleen whales eat tiny animals like krill?
They filter water through baleen plates to trap the food.
Why don’t all whales eat the same food?
Because different whales have different mouths and hunting styles.
Quick recap
Dolphins mainly eat fish and squid.
Some whales eat tiny animals like krill, others eat fish or seals.
Baleen whales filter food from water using baleen plates.
