Blue Whale Biology and Behavior

Blue whales are the largest animals on Earth, growing to immense sizes by feeding on tiny krill. Their unique lunge feeding strategy allows them to consume large amounts of krill efficiently. Despite their size, blue whales have anatomical adaptations like baleen to filter krill from water. Their massive size is supported by the buoyancy of water, allowing them to grow larger than land animals. However, their growth is limited by the energy demands of lunge feeding, which increases with size. Blue whales exemplify the evolutionary impact of their krill diet, showcasing the adage 'you are what you eat.'

What is the primary diet of blue whales?

• Plankton

• Seaweed

• Fish

• Krill

What feeding strategy do blue whales use to consume krill?

• Lunge feeding

• Filter feeding

• Suction feeding

• Bottom feeding

How much water and krill can a blue whale take in with each gulp?

• 50% of its body weight

• 75% of its body weight

• 125% of its body weight

• 100% of its body weight

What is the blue whale's heart size comparable to?

• A basketball

• A small car

• A bicycle

• A refrigerator

Why can't blue whales eat larger prey than krill?

• They prefer krill

• They are not fast enough

• Their esophagus is too small

• Their teeth are too small

Why are blue whales larger than elephants?

• They have larger muscles

• They eat more food

• They live in water

• They have more bones

What role does buoyancy play in the size of blue whales?

• It makes them heavier

• It supports their weight

• It reduces their size

• It increases their speed

What is the maximum size a lunge feeder like the blue whale can grow to?

• 35 meters

• 33 meters

• 30 meters

• 25 meters

Why can't blue whales grow larger than their current size?

• Lack of food

• Energy demands increase faster than energy intake

• Predators limit their size

• Water pressure limits growth

What evolutionary adaptation allows blue whales to consume large amounts of krill?

• Large mouth and lunge feeding

• Sharp teeth

• Fast swimming

• Thick blubber