The giant squid has eyes the size of a beach ball.
The giant squid is the largest invertebrate on Earth. The largest ever measured was 59 feet long, but the species remains largely a mystery, as they live so deep under the sea. Almost everything scientists know about them is based on carcasses that have washed up on the beach. Carcasses with eyes measuring some 10 inches in diameter.
The giant squid’s massive eyes allow them to detect objects and creatures at depths that light can't reach, where most other animals are essentially rendered blind, giving them an advantage over their prey: usually shrimp, fish, and other squid, but sometimes even small whales.
Image: Science Photo Library/Corbis