The giant squid can grow into a big one, weighing about 500 kilograms and reaching a length of 14 meters. If Megalodon attacks it in deep enough water, squid can attack Megalodon with its strong beak and entangle it with tentacles. It can stop the shark from moving, and Megalodon will drown. Squid is very clever. They know how to use tools when hunting and can successfully disguise themselves when necessary.
Black dragon is one of the coolest scaly reptiles on earth. It is a huge and deadly monster, which feeds on large aquatic creatures in the ocean and is a powerful opponent of Megalodon. It can grow to 17 meters long. Its body is thinner and easier to manipulate than modern whales. Flint black dragon is the highest in the black dragon family, and may have good eyesight. Its teeth can withstand very strong bites, so the poor Megalodon will fully feel it on the skin.
Crocodile is a famous ancient crocodile. It looks like a walking nightmare, threatening prehistoric land. This ancient reptile is a top predator, feeding on large dinosaurs, big fish and even large turtles. It is very fast, and it has a kind of bone plate called "bone skin", which can protect it from almost everyone. The adult alligator is about 12 meters long (with tail) and weighs about 7-8 tons. It looks like a modern alligator.
Wang Long whale is a large animal, its length is equivalent to Megalodon, ranging from 14-20 meters. This animal was once mistaken for a reptile, but it is actually a whale with huge teeth and slim figure. In their diet, Wang Long whales only eat big sharks and fish. The interesting fact about this whale is that the dragon king whale can bite its prey and chew it. If it comes to diet, the Longwang whale is very similar to its modern close relative killer whale.