Seahorses occupy a middle position in their food chain. They are carnivores that feed on tiny crustaceans, such as shrimp. The shrimp feed on algae, which are near the base of the food chain. Seahorses are preyed upon by crabs and fish, which are eaten by larger fish. These large fish are hunted by apex predators, including sharks that are at the top of the food chain.
Seahorses use their prehensile tails to anchor themselves to plants or coral. Because they are sedentary and camouflage easily, they can ambush their prey at any moment. When shrimp and other small organisms swim by them, seahorses quickly suck them in with their elongated snouts. They feed continuously and can eat as much as 3,000 brine shrimp in a day.
Seahorses are slow, rather inept swimmers that tire easily, so they use their natural camouflage to hide from predators. Seahorses are often captured as specimens for aquariums. Humans also fish for them in East Asia because the natives there believe that seahorses have medicinal properties. The Convention on International Trade in Endangered Species of Wild Flora and Fauna attempts to control the import and export of seahorses, although several nations have opted out of these regulations.Learn More
The key to determining if a starfish is alive or dead is to look for movement. However, because starfish are not the most mobile organisms on the planet, it can be difficult to tell if they are alive or dead. If you cannot observe any movement at all, the starfish is probably dead.Full Answer >
Seashells are exoskeletons of marine invertebrates such as mollusks and sea snails, and they grow from the inside out or by depositing new material at the edges, according to Scientific American. Two common types of seashells are bivalves and gastropod shells. The former are made by mollusks such as oysters and clams. The latter are exoskeletons of marine snails.Full Answer >
A shrimp's heart is located in its head. There are around 2,000 species of shrimp in the world.Full Answer >
Killer whales are endangered due to a number of threats, including oil spills, bio-accumulation of PCB and other contaminants, noise pollution, collisions with ships, entanglement in fishing gear, shootings by fishermen, and habitat disturbance by whale watchers. Additionally, the depletion of populations of prey, such as marine mammals and certain species of fish, affects its ecosystem.Full Answer >