Krill eat phytoplankton and tiny single-celled plants and algae. Most species of krill are omnivorous filter feeders, although there are some carnivorous species that eat the larvae of fish and zooplankton. Most krill use their frontal appendages to form fine combs, which allow them to filter food from the water.Know More
Krill are crustaceans similar to shrimp, and they are an essential link in the global food chain. Without krill, countless aquatic creatures all over the world would become extinct. Hundreds of species of fish, penguins, seals, birds and whales depend on krill as their primary food source. For example, in 1998, declining krill populations are believed to have caused salmon not to breed for a season in the Bering Sea. Often ecosystem disturbances can have far-reaching consequences as the food chain is broken.
As of 2014, it's believed that global warming is causing a decline in Antarctic krill populations. As temperatures rise and the ice melts, ice-algae becomes more scarce, which is an important food source for krill. Studies have shown that the amount of krill in the Antarctic has decreased by as much as 80 percent since the 1970s. Continued declination of krill could cause a severe loss of animal life in the Antarctic. Although krill use sunlight and carbon dioxide for energy, additional sustenance is required.Learn more in Marine Life
Crawdads, or crayfish, feed on small fish that can be captured with their claws, other invertebrates and plants, both living and dead. Those are that are kept in freshwater aquariums will eat regular and tropical fish food, shrimp pellets and various vegetables. Crayfish represent an important link in the food chain and are a food source for fish, such as bass, and water birds, such as herons.Full Answer >
Penguins are not able to breathe underwater; however, all 17 of the penguin species can hold their breath for as long as 15 minutes. This amazing capability allows them to dive deep within the ocean to find food.Full Answer >
Scientists believe that there are over 1 million species of animals and plants living in the ocean. Some speculate that there are 9 million species that have not yet been discovered.Full Answer >
Coral is a colorless marine animal that lives on the ocean floor and can be red, orange and other colors. Any color that appears to be present on coral is a buildup of algae that live on the coral. Like other animals of the sea, coral can change color with emotion.Full Answer >