Thursday, 2 July 2009

Octopus




Puffer Fish

Moray Eel


Family: Muraenidae

Species: Gymnothorax javanicus

Size: 2 feet (60 cm)

Diet: Carnivorous

Temperament: Aggressive

StingRay

Stingray


Wings in the Water: Stingrays are usually large and flat, with pectoral fins that look more like wings than fins and are used for propulsion. Rays like to roam along the seabed and sometimes bury themselves in the loose sediment as protection against predators. Organs located behind the eyes, called spiracles, help them to breathe when hidden under the sand. Unlike the bat ray, which forms schools of several hundred individuals, most rays are solitary.

Bottom Feeder:
Rays are carnivores and feed on bottom-dwelling fish. The mouths of most species are located on their underside and have interlocking teeth perfect for grasping and crushing prey. Other species feed more like the toothless whale by filtering fish and plankton through their sievelike gills.

Species Found @ Bedok Jetty


Lemon Shark

Negaprion brevirostris

Overview - Lemon sharks may dive up to 1,300 feet when searching for food, but usually they are found near shore areas at depths closer to 295 feet. Their unusual coloration sets them apart from most other sharks. “Lemon” refers to their light brown, yellow-tinged skin. It provides good camouflage for the sharks, which like to rest over the sandy bottoms of shallow water regions. From a distance, it is hard to tell where the sand ends and the shark begins. One clue might be the presence of small reef fishes, such as wrasses, which gather around this shark to pick off parasites from its gills and skin. This species is most commonly found in the Caribbean, but it also exists in the western and eastern Atlantic and eastern Pacific from southern Baja California to Ecuador.

Feeding behavior - Lemon sharks may chase down other sharks as prey, along with large sea birds, squid, crustaceans, stingrays and eagle rays. This is not an aggressive shark species toward humans; however, when threatened, this big yellow fish will not hesitate to inflict a potentially serious, and even deadly, bite.

Cool fact - Its scientific name means “the shark with the smooth teeth and the short snout.”

Depth - 295 feet