Sponges primarily use chemicals to protect themselves, and the chemicals are either toxic or just taste bad. This not only prevents predation but also competition, as the chemicals they release prevent other organisms from growing near them. Individual species have other strategies, such as burrowing into corals, rocks or molluscs to gain protection.Know More
Another strategy many corals use to keep predators such as sea stars away is shedding tiny bits of their skeletal elements, called spicules, onto the sea floor. These can accumulate in a thick layer, deterring predators that must crawl to reach them. Not all sponges have a direct defense mechanism. Glass sponges do not produce any toxins, but they live in the very deep ocean where predators are rare.
Despite their defenses, sponges can only make slight movements, when they can move at all. They are vulnerable to any organisms that can overcome their defenses and are prey to many species of turtles, fish and invertebrates. Sponges can partially benefit from predation, however, as fragments of sponge left behind by predators can often survive and re-establish themselves as independent organisms. Their extremely simple cell-level organization means they can often survive even severe damage caused by predators or environmental effects.Learn more about Marine Life
In the wild, green wolf eels, also known as carpet eel blennies, can be found in the Eastern Indian Ocean and the Western Pacific Ocean. They inhabit shallow waters of tidal flats and lagoon sea-grass beds, ranging from the Nicobar Islands to Papua New Guinea, Northwest Australia and the Ryukyu Islands of Japan.Full Answer >
Shrimp have been known to live from 1 year to as long as over 20 years in captivity. According to the Northeast Fisheries Science Center, the life cycle varies based on geography and the species of shrimp.Full Answer >
Mollusks begin as eggs, transform into larvae, then into veligers before emerging as adults.The mollusk development process and life cycle is complex, particularly in the early stages of development. Upon reaching adulthood, mollusks make their homes in oceans and on land surfaces around the world, but all breed and reproduce in water.Full Answer >
Dolphins hear when the sounds in the water bounce off the dolphin's jaw bone into the middle ear. Dolphins can hear far better than humans and their hearing is even better than that of dogs.Full Answer >