Here are the top five largest living fish species (within around 33,100 described species).
But, first of all, what is a fish? At first, it looks like an easy question, but in fact it is not. There are a wide range of animals we call “fish”, so it is not easy to define what makes a fish “a fish”. A general description: “a fish is any member of a paraphyletic group of organisms that consist of all gill-bearing aquatic craniate animals that lack limbs with digits” (wikipedia).
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Crocodiles (subfamily Crocodylinae) or true crocodiles are large aquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. Although they are big, they suffer from a prevalence of “big fish” stories and over-exaggeration. In the Internet age, photographs of crocodiles manipulated digitally to make the animal look much larger than it is. But how big are they actually? Here are the top
five ten largest crocodiles ever recorded (when I wrote the post, I didn’t know about Gomek; and after I published it, the Guinness World Record book has accepted a claim that a 23 ft/7.01 meters male saltwater crocodile weighing 2,000 kg lives within Bhitarkanika Park in the state of Orissa, India).
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Four Nile crocodiles have been found in Florida by scientists from the University of Florida. Between 2002 and 2004, the researchers have studied populations of crocodiles in the state. Previously, using DNA analysis, they found three Nile crocs: one was a foot long hatchling sitting on a porch in Miami. Another was found on the property of a private zoo in Homestead, and a third, also in Homestead, a 10-pound (4.5 kg) female, was captured in a public park.
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After the extinction of the dinosaurs, approximately 66 million years ago, the rise of mammals begun. There were mammals on earth before that date, but after the Cretaceous–Paleogene (K–Pg) extinction event (a mass extinction of some three-quarters of the plant and animal species on Earth—including all non-avian dinosaurs), mammals took over the medium- to large-sized ecological niches.
Some of them reached enormous sizes, usually they were larger than today’s counterparts (with the exception of whales). Here are some of the largest known prehistoric mammals.
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Bite force is an important property of carnivore ecology, because these amazing animals need to kill their prey as easily as possible, and the bite force is an vital factor in this context. Here are the top 22 most powerful bites in carnivore land mammals.
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An amazing and wonderful video that I came across a few years ago: Michael Fishbach, co-founder of The Great Whale Conservancy, his family and friends rescued a Humpback Whale from fishnets, and after being freed, the whale shows amazing appreciation to the rescuers.
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Like all prehistoric counterparts of today’s animals, the prehistoric cats were usually larger, heavier and more robust than today’s felines. Here are the top five largest prehistoric cats.
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National Geographic grantee Federico Fanti and his research team have unearthed a sea-dwelling crocodylomorph (a teleosaurid) skeleton in southern Tunisia, in the Sahara desert: Machimosaurus rex. It is the world’s largest marine crocodyliform, and was previously unknown to science. It’s length is estimated at more than 30 feet (9.14 meters). The giant was probably weighed three tons.
Continue reading A giant prehistoric crocodile discovered in the Sahara: Machimosaurus rex
In 2010, during an expedition of the Spanish research ship Miguel Oliver, the researchers from the Smithsonian Tropical Research Institute discovered a new type of shark in the Pacific Ocean near Central America, off the coasts of Nicaragua, Panama and Costa Rica. The shark was glowing in the dark. Now it is officially a new kind of shark: its scientific name is Etmopterus benchleyi (it features a tribute to the famous 1974 novel “Jaws” author Peter Benchley), but since it is pure black, it is called “Ninja lanternshark”.
Continue reading The shark that glowing in the dark has been announced as a New Species: the “Ninja lanternshark”
Identifying the largest dinosaurs ever lived isn’t an easy task, because it’s very rare to unearth a complete fossil. Furthermore, only a tiny percentage of these amazing animals ever fossilized, and most of these “lucky” bodies will remain buried underground forever. So, we may never know exactly what dinosaur was the biggest (or the tiniest) ever.
Despite this fact, size always has been one of the most interesting aspects of these prehistoric animals. There are extreme variations in their size, from the tiny hummingbirds, which can weigh as little as three grams, to the titanosaurs, which could weigh as much as 70 tonnes, or even more.
Here are some of the largest dinosaurs ever lived.
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