What animal has no brain no heart no bones and no true eyes?

The animal that fits this description is a jellyfish. Jellyfish are composed of a gelatinous substance and have a simple body structure without a brain, heart, or bones. They also lack true eyes, instead possessing light-sensitive cells that help them detect light and movement in their environment. Despite their simplicity, jellyfish are fascinating creatures with unique adaptations for survival in the ocean.