Getty Images/iStockphoto An invasive fish species related to the piranha was caught in a Texas lake, wildlife officials said. A pacu, a freshwater fish native to South America, was caught Aug. 25 ...

Cleaner fishes can gain a mental image of their own size compared to other fishes by looking in a mirror, according to a new ...

The glass-paned box – which has been painted with what appears to be translucent spray paint to turn it into what looks like ...

The decision to move the piranha police ... It comes after the giant fish tank on a police sentry box in London appeared on Sunday, following dark silhouette images of a goat, elephants, monkeys ...