The hatchlings do not have sex chromosomes so their gender is determined by the temperature within the nest. The temperature varies slightly among species, ranging between roughly 83-85 degrees Fahrenheit (28-29 degrees Celsius), at which embryos within a nest develop into a mix of males and females. Temperatures above this range produce females and colder temperatures produce males. It's estimated that only 1 in 1,000 hatchlings will survive to adulthood. Once near the surface, they will often remain there until the temperature of the sand cools, usually indicating nighttime, when they are less likely to be eaten by predators or overheat. Once out of the nest, hatchlings face many predators including ghost crabs, birds, raccoons, dogs, and fish.
In addition to their possible great size, another defense that some groupers have is the ability to change the color of their skin to match their background.. Sometimes this color change is simple, such as turning from dark to light in order to blend in with varying levels of light. They swim slowly, but with power. They're not capable of fast breaks or swimming long distances, but anyone who's been on the other end of one on a deep sea fishing charter in Destin can tell you they have one heck of a dive pull. Some groupers are so huge that when they open their mouths to feed, they create a suction that is powerful enough to inhale small prey.
Whale sharks are filter feeders that eat plankton through their gills for much of their nourishment. They also eat squid, krill, and small fish. A whale shark can process more than 6,000 liters of water an hour through its gills. Whale sharks are in no way related to whales. Although they are sharks, they are very docile. A whale shark’s mouth is at the very front of its head—as opposed to the underside of the head like most sharks.
Shore Buddies is a proud sponsor ofh2hacksHeckathon, a student led organization that uses innovative technology dedicated to saving the world through environmental means. The Hackathon theme this year involved global environmental issues pertaining to conservation, sustainability, education and awareness.