Examples of deep-sea gigantism include the big red jellyfish, the giant isopod, giant ostracod, the giant sea spider, the giant amphipod, the Japanese spider crab, the giant oarfish, the deepwater stingray, the seven-arm octopus, and a number of squid species: the colossal squid (up to 14 m in length), the giant squid ...
Hundreds of years ago, European sailors told of a sea monster called the kraken that could toss ships into the air with its many long arms. Today we know sea monsters aren't real--but a living sea animal, the giant squid, has 10 arms and can grow longer than a school bus.
The Antarctic blue whale (Balaenoptera musculus ssp. Intermedia) is the biggest animal on the planet, weighing up to 400,000 pounds (approximately 33 elephants) and reaching up to 98 feet in length.
Oceans make up roughly 99.5% of the planet's habitats by volume, and within those largely unexplored depths there are thought to be scores of large marine animals unknown to science. When you consider smaller animals too, the number of unknown species rises to the millions.
The largest animal known ever to have lived is confirmed to be the blue whale (Balaenoptera musculus). The maximum recorded weight was 190 tonnes for a specimen measuring 27.6 metres (91 ft), whereas longer ones, up to 33.6 metres (110 ft), have been recorded but not weighed.
A fish found off the coast of Japan could be the deepest ever recorded. Japanese and Australian researchers filmed a Pseudoliparis snailfish at 8,336 metres down as part of an expedition to some of the world's deepest ocean trenches.
A blue whale can grow to up to five times the size of a megalodon. Blue whales reach a maximum length of 110 feet, which is far larger than even the biggest meg. Blue whales also weigh significantly more compared to the megalodon.
Patagotitan mayorum, the Titanosaur
Patagotitan mayorum may have been the world's largest terrestrial animal of all time, based on size estimates made after considering a haul of fossilized bones attributed to the species.
First of all, blue whales are significantly larger than megalodons. The largest blue whale ever weighed 418,878 pounds (more than 200 tons) while average blue whales weigh more than 100 tons. In addition, megalodons were sexually dimorphic, which means the females were significantly larger than males.
Although fictional and the subject of myth, the legend of the Kraken continues to the present day, with numerous references in film, literature, television, and other popular culture topics.
Though this piece started as a fictional "Field Report," there is a need to clarify that Godzilla is in fact not real. It was first created as a metaphor for the destructive power of atomic energy in a post World War 2 Japan, and it was Toho Studios' way of putting out their version of an anti-nuclear protest.
It's thought that megalodon sharks became extinct in part due to climate change: as oceans grew colder, they may not have been able to regulate their temperatures as needed. Lack of prey could be behind the megalodon's extinction, as many marine animals and fish could not survive the cold temperatures.
Megalodon is NOT alive today, it went extinct around 3.5 million years ago. Go to the Megalodon Shark Page to learn the real facts about the largest shark to ever live, including the actual research about it's extinction.
Why did megalodon go extinct? We know that megalodon had become extinct by the end of the Pliocene (2.6 million years ago), when the planet entered a phase of global cooling. Precisely when the last megalodon died is not known, but new evidence suggests that it was at least 3.6 million years ago.
In addition to being the world's largest fish, megalodon may have been the largest marine predator that has ever lived. (Basilosaurids and pliosaurs may have been just as large.) Megalodon was an apex predator, or top carnivore, in the marine environments it inhabited (see also keystone species).
The weakest animal you could beat in a fight is a rat or cat (around 70%) while the strongest animal you could beat is a grizzly bear, lion, elephant, or gorilla (around 3%). The other animals include goose, dog, eagle, chimpanzee, cobra, kangaroo, wolf, and crocodile.
The biggest shark in the world is the whale shark
Though there are some reports of larger individuals, the biggest specimen ever reliably measured was 18.8 metres or nearly 62 feet long! That's bigger than a school bus! Even though they're enormous, whale sharks pose no danger to humans.
Megalodons are extinct. They died out about 3.5 million years ago. And scientists know this because, once again, they looked at the teeth. All sharks – including megalodons – produce and ultimately lose tens of thousands of teeth throughout their lives.
The whale shark, Rhincodon typus, is the largest fish in the world. It is found in tropical and temperate oceans, in both deep water and coastal areas.
1.Box jellyfish
Considered the most deadly creature in the sea, the box jellyfish may be beautiful to look at, but it has enough venom to kill a human in a matter of minutes. Native to Australia and found in Indo-Pacific waters, the box jellyfish has around 15 tentacles that can reach lengths of upto three meters.
The creature is called a siphonophore and its outer ring is nearly 50 feet in diameter. Its closest relative seems to be jellyfish.
Siphonophores are deep-sea predators made up of many small clones that act together as one and spread out like a single long string in the water.
The battle for diminishing stocks of whales and other prey may have pushed the megalodon to extinction three million years ago. Environmental pressures, such as sea level changes, also played a role. The extinction of the megalodon has been an enduring mystery.