Why are antidepressants found in shark brains?

Antidepressants are found in shark brains because sharks have special brain chemicals that help them stay calm and happy, just like how medicine helps people feel better.

Sharks, like humans, need special helpers in their brain to keep them from getting too stressed or sad. These helpers are called neurotransmitters, which work like little messengers sending signals all over the brain.

When sharks swim through the ocean and catch fish, these neurotransmitters help them feel proud and excited, kind of like how you feel when you win a game at school!

Scientists noticed that some of these same brain chemicals are in antidepressants, the medicine people take to feel better when they're sad or stressed. So it's like sharks have their own version of happy pills built right into their brains!

That’s why scientists say, “Hey, sharks might be using a special kind of brain medicine too!” It helps them stay calm and brave even in the middle of the ocean.