Learn English: Why Humpback Whales Can't Always See Danger! (easy)

Humpback whales are big and friendly, but they can't see very well, which is a big problem.

Their eyes aren't very good at seeing small things like fishing nets, so they can get tangled up.

Imagine trying to spot a thin string from far away – that's how hard it is for them to see nets!

Scientists are learning about this so they can help keep the whales safe from boats and nets.