Bait Ball Behavior and Interactions

The video describes the formation of a mackerel bait ball, a natural phenomenon where mackerel group together to form a large mass. This bait ball attracts predators like bluefin tuna and dolphins, which see it as an opportunity to feed. Dolphins use air bubbles to pack the mackerel tighter, making the bait ball visible to seabirds such as shearwaters. The video concludes with the bait ball being decimated by these predators.

What is the purpose of a bait ball formed by mackerel?

• To attract more mackerel

• To migrate to warmer waters

• To scare away predators

• To find a mate

How do bluefin tuna react to the bait ball?

• They help protect it

• They avoid it

• They are intimidated

• They see it as a feeding opportunity

Which other predators are attracted to the bait ball besides bluefin tuna?

• Sharks

• Seals

• Dolphins

• Whales

What technique do dolphins use to pack the mackerel tighter?

• Water currents

• Air bubbles

• Electric pulses

• Sonic waves

What happens to the bait ball eventually?

• It is decimated

• It migrates

• It becomes a permanent structure

• It grows larger