Tridacna squamosa, is one of a Number of Large Clam Species Native to the Shallow Coral Reefs of the South Pacific and Indian Oceans. (23 Pics)

Tridacna squamosa, known commonly as the fluted giant clam and scaly clam,^[1] is one of a number of large clam species native to the shallow coral reefs of the South Pacific and Indian Oceans. It is distinguished by the large, leaf-like fluted edges on its shell called 'scutes' and a byssal opening that is small compared to those of other members of the Tridacnidae family. Normal coloration of the mantle ranges from browns and purples to greens and yellows arranged in elongated linear or spot-like patterns. Tridacna squamosa grows to 40 centimetres (16 in) across.

Sessile in adulthood, the clam's mantle tissues act as a habitat for the symbiotic single-celled dinoflagellate algae (zooxanthellae) from which it gets a major portion of its nutrition. By day, the clam spreads out its mantle tissue so that the algae receive the sunlight they need to photosynthesize.

The native range spans from South Africa to the Red Sea and to the Marshall Islands.

Tridacna squamosa is sometimes kept in aquaria, where it requires a moderate amount of care. This species is a relatively hardy member of the Tridacnidae.

A moderate amount of light is required by this species because it relies on zooxanthellae for part of its nutrition. These dinoflagellates use the mantle as a habitat. However, it is not nearly as dependent on this photosynthesis as other tridacnids such as Tridacna crocea or T. maxima, and it also consumes phytoplankton to complete its diet.

From:http://en.wikipedia.org/wiki/Fluted_giant_clam

The Pacific electric ray (Torpedo californica) is a species of electric rayendemic to the coastal waters of the northeastern Pacific Ocean from Baja California to British Columbia. (16 Pics)

The Pacific electric ray (Torpedo californica) is a species of electric ray in the family Torpedinidae, endemic to the coastal waters of the northeastern Pacific Ocean from Baja California to British Columbia. It generally inhabits sandy flats, rocky reefs, and kelp forests from the surface to a depth of 200 m (660 ft), but has also been known to make forays into the open ocean. Measuring up to 1.4 m (4.6 ft) long, this species has smooth-rimmed spiracles (paired respiratory openings behind the eyes) and a dark gray, slate, or brown dorsal coloration, sometimes with dark spots. Its body form is typical of the genus, with a rounded pectoral fin disc wider than long and a thick tail bearing two dorsal fins of unequal size and a well-developed caudal fin.The only electric ray found off western North America, the Pacific electric ray occurs as far south as Sebastian Vizcaino Bay in Baja California, and as far north as the Dixon Entrance in northern British Columbia. It is most common south of Point Conception, California, with the rays north of the Point perhaps representing one or more separate populations.The Pacific electric ray has a soft, flabby body devoid of dermal denticles. It has an oval pectoral fin disc about 1.2 times as wide as long, with a nearly straight front margin and a pair of kidney-shaped electric organs visible beneath the skin.^[3][6] The eyes are small and followed by smooth-rimmed spiracles; the space from the spiracles to the snout tip is about 1.8 times the distance between the spiracles. There is a curtain of skin between the nostrils that almost reaches the mouth, which is arched with deep furrows at the corners. The distance between the mouth and the snout tip is about equal to the mouth width, and three times that of the distance between the nostrils.^[6][9] There are 25–28 upper tooth rows and 19–26 lower tooth rows; each tooth is tiny and smooth, with a single sharp cusp.

From:http://en.wikipedia.org/wiki/Pacific_electric_ray

The world's longest bony fish. The giant oarfish (Regalecus glesne) (45 Pics)

The giant oarfish (Regalecus glesne), also called the king of herrings, is a species of oarfish of the family Regalecidae. It is an oceanodromous species that has a worldwide distribution, excluding polar regions.

Regalecus glesne is the world's longest bony fish. Its shape is ribbonlike, narrow laterally, with a dorsal fin along its entire length, stubby pectoral fins and long, oar-shaped pelvic fins, from which its common name is derived. Its coloration is silvery with dark markings, and its fins are red.

Its physical characteristics and its undulating mode of swimming have led to speculation that it might be the source of many "sea-serpent" sightings.

Source: http://en.wikipedia.org/wiki/Giant_oarfish