A Moment of Science
Siamese fighting fish are as beautiful, but this isn't the reason they were first domesticated by us humans.
They might seem innocent and lovely in your aquarium, but released into the wild, your plants and fish can knock aquatic ecosystems right out of balance.
Starfish can regenerate their legs, worms can survive being cut into, but what creature can actually fix a broken heart? Find out on this Moment of Science.
Do fish actually have a working memory? Recent experiments show that fish can in fact remember things for several days.
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