When Theodore Roosevelt journeyed to South America in 1913, he encountered, among other exotic creatures, several different species of piranha. Here's what he had to say about them in his bestseller, Through the Brazilian Wilderness: "They are the most ferocious fish in the world. Even the most formidable fish, the sharks or the barracudas, usually attack things smaller than themselves. But the piranhas habitually attack things much larger than themselves. They will snap a finger off a hand incautiously trailed in the water; they mutilate swimmers—in every river town in Paraguay there are men who have been thus mutilated; they will rend and devour alive any wounded man or beast; for blood in the water excites them to madness. They will tear wounded wild fowl to pieces; and bite off the tails of big fish as they grow exhausted when fighting after being hooked."

The rock has a fish farm he tends to do for relaxing. He works with a team of university biologists to ensure he's giving his fish a thriving ecosystem full of largemouth bass, stripped bass, trout, carp, sunfish etc.

You can't drink sea water, but you can drink sea ice. However, you don't want to drink fresh sea ice, which still has little pockets of brine trapped in between ice crystals. As the ice ages, the brine drains out, and the ice becomes fresh enough that, according to the NSIDC, it can be melted and consumed.

Scientists created the first-ever peanut butter jellyfish by blending all-natural creamy peanut butter with saltwater and adding it to the tanks of moon jellies. Aquarists at the Dallas. Goofy as the experiment was, peanut butter is a potential source of protein for jellies, fish and other aquarium residents. Worry not for the experimental jellies: They scarfed the peanut-butter protein out of their tanks and actually grew about 0.2 inches (4 millimeters) in 8 days. They also took on a brownish hue.

Fish in the lower St. Croix River can contain dangerous levels of industrial chemicals, a Minnesota state agency has found. Toxins related to products like Scotchgard and Teflon have previously been known to pollute groundwater in areas between Lake Elmo and the St. Croix, as well as across the country. Now it has been found in fish in the river at levels considered possibly harmful to human health. The affected zone is the entire 50 miles of river below Taylors Falls to the Mississippi. For some people, scientists say the health benefits of eating fish probably outweigh the risks posed by PFAS. But children under 15 and women who may become pregnant, or are pregnant and nursing, are a higher risk. The chemicals primarily threaten development of fetuses and children, weakening immune systems, interfering with hormone levels, and similar effects.

Researchers at monterey bay aquarium research institute (MBARI) unveil the benthic rover II, an autonomous, deep-sea roaming robot. the benthic rover II traveled to a depth of 4,000 meters (13,100 feet) to explore the muddy floor of the deep sea, and will autonomously collect oceanographic data for more than five years. the intrepid robot, about the size of a small car, is equipped with onboard cameras and other such instruments which capture glimpses of the mysterious communities which occupy the floor of the deep. The benthic rover II will withstand the cold, corrosive, and high-pressure conditions of the deep sea. constructed from corrosion-resistant titanium, plastic, and pressure-resistant syntactic foam, the bot can withstand depths reaching 6,000 meters (about 19,700 feet) deep — for reference, the earth's deepest oceanic trench, mariana's trench, is 11,034 meters (36,201 feet) deep. the robot will uncover the mysterious creatures which occupy the ocean's depths while reporting critical data which will help the team of researchers — led by alana sherman of electrical engineering group and ken smith of MBARI — to understand the poorly quantified deep-ocean carbon cycle. while it's widely understood that increasing carbon dioxide emissions have harmfully impacted the changing climate, the rover will offer more insight into these effects.

A fish called the Pacific lingcod has one of nature's toothiest mouths, with about 555 teeth lining its two sets of jaws. Now, a new study suggests that these fish lose teeth as fast as they grow them — at an astonishing rate of 20 per day. To understand how the Pacific lingcod's mouth looks and functions, first throw out almost everything you know about your own mouth. Instead of incisors, molars and canines, these fish have hundreds of sharp, near-microscopic teeth on their jaws. Their hard palate is also covered in hundreds of tiny dental stalactites. And behind one set of jaws lies another set of accessory jaws, called pharyngeal jaws, that the fish use to chew food much in the same way humans use molars. Because the Pacific lingcod's teeth are so small, figuring out how quickly these fish lose their teeth was not as simple as sweeping them from the aquarium floor. Instead, the researchers placed the lingcod in a tank filled with a dilute red dye, which stained the fish's teeth red. Later, the researchers moved the fish to a tank filled with a fluorescent green dye, which stained the teeth again. In total, they counted over 10,000 teeth across all 20 captive fish. They also found that the fish lose an average of roughly 20 teeth per day.

The pompano supports an important commercial and recreational fishery. Florida pompano are commercially fished in all states on the East Coast from Virginia to Texas, with Florida producing over 90% of the annual harvest. Harvesting occurs mostly along Florida's western coast, with some harvesting on the eastern coast and in the Banana and Indian Rivers. Between 1994 and 2006, it commanded dockside prices of more than $3 per pound of whole fish weight. Chefs like it because the fillets are of even thickness, which aids in cooking. A popular dish created in New Orleans, called "pompano en papillote," is wrapped in parchment paper with a white sauce of wine, shrimp, and crabmeat, and then steamed.

Fire coral is a marine animal but not like other true corals. It is spotted around the Caribbean, as well as the main oceans around the world. Many people have confused these corals with seaweeds. These fire corals are considered to be slightly more harmful than other coral reef cuts. This is mainly because fire coral has an ability that leaves a stinging effect on the object that comes in contact with it. The sting is supposed to be warm and has symptoms with a severe burning effect on the surface. This is also one of the reasons they are called 'Fire'.

The points of the so-called Bermuda Triangle are Miami, Puerto Rico, and Bermuda—but don't worry if you've booked a trip to any of those destinations. Despite the area being known for the unexplained disappearances of ships and planes, there really isn't any evidence that it's more dangerous than anywhere else in the world, or that there's any supernatural phenomenon at work. But, the National Oceanic and Atmospheric Administration (NOAA) does admit there could be scientific reasons for the disappearances, such as the likelihood of hurricanes, rapid changes in weather due to the Gulf Stream, and the numerous islands in the Caribbean that make for tricky navigation. NOAA also acknowledges that the area could possibly mess with navigational tools, making them point true north as opposed to magnetic north; or that "oceanic flatulence," a burst of methane gas from the sea, could somehow have affected the vessels and planes.