World Amazing Top Facts

10 Hagfish
 
According to the fossil record, hagfish have existed for over 300 million years, which means they were already old when dinosaurs took over the world! Found in relatively deep waters, these animals are sometimes called slime eels, but they are not really eels, and actually, they may not even be fish at all,according to some scientists. They are very bizarre animals in all regards; they have a skull but lack a spine, and they have two brains. Almost blind, they feed at night on the carcasses of large animals (fish, cetaceans etc) which fall to the sea bottom. They owe their “slime eel” nickname to the fact that they produce a slimey substance to damage the gills of predatory fish; as a result, they have virtually no natural enemies. 9 more after the break...

9 Lancetfish

The lancetfish has a very obvious “prehistoric” appearance, with those fierce-looking, sharp teeth on its jaws and the sail on its back, reminiscent of that of some dinosaurs (although, in the lancetfish the sail is actually an enlarged dorsal fin). Even its scientific name has a dinosaurian sound to it (Alepisaurus ferox). Up to two meters (6' 6?) in length, this predator is found in all the oceans except for polar regions; very voracious, it feeds on smaller fish and squid, and has known to feed on members of its own species sometimes.

8 Arowana

Belonging to the ancient group of the Osteoglossids, these fish already existed in the Jurassic period. Today, they are found in the Amazon, and in parts of Africa, Asia and Australia. Sometimes kept as exotic pets, arowanas are voracious predators that feed on any small animal they can catch, including birds and bats which they catch in mid flight (they are able to leap up to 2 meters (6' 6?) into the air). In China, arowanas are known as “dragon-fish” due to their appearance, and they are thought to be harbingers of good luck.

7 Frilled Shark