Author: Marilyn Medina

Sharks are Apex Predators This is because they have very few natural predators. A cascade effect naturally occurs in a balanced, healthy ecosystem, whether it be marine or terrestrial. Why are sharks so good predators? Great white sharks are athletic hunters, leaping completely out of the water as they attack prey from below. They have […]

Sharks are fish. They live in water, and use their gills to filter oxygen from the water. Sharks are a special type of fish known because their body is made out of cartilage instead of bones like other fish. What determines if a fish is a shark? Body shape. If you look at most fish […]

1. a person who victimizes others, as by swindling or cheating. 2. US, Slang. a person with great ability in a given activity; adept; expert. What does it mean to call a girl a shark? 1. a person who victimizes others, as by swindling or cheating. US, Slang. a person with great ability in a […]

4. Shark skin feels similar to sandpaper. Shark skin feels exactly like sandpaper because it is made up of tiny teeth-like structures called placoid scales, also known as dermal denticles. These scales point towards the tail and help reduce friction from surrounding water when the shark swims. What does a shark feel like to touch? […]

But here’s the truth — sharks are actually shy creatures. Hierarchy in a shark’s world is based on size, not species. A diver with its fins and tank is typically larger than most sharks and they tend to give the unknown bigger creature a wide berth. Are sharks friendly? Despite their scary reputation, sharks rarely […]

Except they have a sixth sense, called the Ampullae of Lorenzini which are first described in 1678 by researcher Stephan Lorenzini. Sharks have a network of special cells that can detect electricity, called electroreceptors, in their heads. They use them together with the olfactory for hunting and navigation. What is the shark’s sixth sense? A […]

The team also found that seals and sea lions with their fins out looked similar in shape to human swimmers and surfers. These findings show that great white sharks may find it hard to visually distinguish humans, seals and sea lions from below, supporting the idea that shark bites are cases of mistaken identity. Do […]

Great White sharks can smell blood from 5km away. They are famous for being able to detect blood in small quantities, or from a long way away. They can also sense one drop of blood in 100 litres of water. What’s so special about great white sharks? These animals are uniquely adapted to their ocean […]

hammerhead sharks. ‘All seeing’ hammerhead sharks could have the best vision in animal kingdom. It may be ugly but the distinctive snout of the hammerhead shark means it has some of the best “all round” vision in the animal kingdom, scientists have discovered. Do sharks have good vision? In studies of sharks eyes it was […]

The great white shark is the ultimate ocean predator. It is on the top of the food chain, and its only biggest living threat is humans. Although great whites are not the largest sharks, they are the biggest predatory sharks living in the world’s oceans. Is a great white shark a top predator? Carcharodon carcharias […]

Great white sharks eat 11 tons of food a year while the average human eats closer to half a ton of food each year. Whale sharks are the world’s biggest fish. Sharks mature slowly and reach reproductive age anywhere from 12 to 15 years. Sharks have been swimming in the ocean for more than 400 […]

According to experts, such as J. E. Randall, the largest, reliably measured Great White Shark, was 6.0 m (19.7 ft) in length, from Ledge Point in Western Australia in 1987. What is largest great white shark on record? What is the Biggest Great White Shark Ever Recorded? The biggest great white shark ever recorded is […]

When it feels threatened, this bold, mid-sized member of the requiem shark family will hunch its back, raise its snout, droop its pectoral fins and swim with amplified movements. If the antagonist — say, a scuba diver — doesn’t heed the warning, the shark may deliver a swift bite or two before taking flight. How […]

Salmon sharks maintain a 70-degree body temperature through high metabolic rates and internal heat exchanges. This study, by researchers at Stanford University, shows that salmon sharks also have an enhanced set of proteins that help their hearts contract at cold temperatures. How cold is too cold for sharks? Some sharks can survive temperatures as low […]

Lion Sharks are fearsome aquatic creatures renowned for the difficult involved in catching them. To catch a large lion shark is the mark of an experienced fisherman. Would a shark or lion win? If this type of fight were possible, the place where the fight would take place would pretty much be the only factor […]

(about 1.9 miles). Greenland sharks are slow-moving, typically swimming at rates of less than 3 km (about 1.9 miles) per hour. They are carnivorous, and their diet is often made up of several different types of fishes, including smaller sharks, eels, flounders, and sculpins. Why is the Greenland shark slow? Life in the cold Specially […]

Untreated Greenland shark meat is toxic to humans. Their meat contains high levels of trimethylamine oxide (TMAO), which breaks down into the poisonous trimethylamine (TMA) compound during digestion, according to a 1991 study published in the journal Toxicon (opens in new tab). Are Greenland sharks harmful to humans? The Greenland shark’s flesh is poisonous when […]

Greenland sharkGreenland sharkAs an ectotherm living in a just-above-freezing environment, the Greenland shark has the lowest swim speed and tail-beat frequency for its size across all fish species, which most likely correlates with its very slow metabolism and extreme longevity.https://en.wikipedia.org › wiki › Greenland_shark Do blind sharks exist? Brachaelurus (blind sharks) is the sole genus […]

1. The Great White Shark. The Great White Shark is one of the better known sharks, primarily for its larger population numbers and expansive habitat, as well as the fact that it has frequently been found to be guilty of attacks on human beings swimming or surfing in the sea. What is the most popular […]

An adult can be one or more of a few different colors. These sharks can be slate gray, purplish gray, violet, brown, or black. In addition, the sides of Greenland sharksGreenland sharksAs an ectotherm living in a just-above-freezing environment, the Greenland shark has the lowest swim speed and tail-beat frequency for its size across all […]