A recent study found that sharks visited urban areas due to easy access to food waste, leftover fish from a nearby aquarium being dumped into the ocean, and runoff creating bottom-up food webs.
Experts think that meadows of seagrass in particular helped ancient seahorses travel away from the waters of the Indonesian region (where they likely originated) and across the world.
For the first time, scientists have documented Octopuses throwing debris at each other.
In the animal kingdom, some creatures are famous for the sounds they make — birds and their songs, cats and their meows, frogs and their ribbits.
But some animals are more quietly mysterious. Do turtles talk? What about other lesser-known vertebrates such as tuataras, caecilians and lungfish?