Photography

Starfish

Starfish

Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or “basket stars”.
Scientific nameAsteroidea
PhylumEchinodermata
ClassAsteroidea; De Blainville, 1830
KingdomAnimalia
RankClass

Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or “basket stars”. About 1,500 species of starfish occur on the seabed in all the world’s oceans, from the tropics to frigid polar waters. They are found from the intertidal zone down to abyssaldepths, 6,000 m (20,000 ft) below the surface.

Starfish are marine invertebrates. They typically have a central disc and five arms, though some species have a larger number of arms. The aboral or upper surface may be smooth, granular or spiny, and is covered with overlapping plates. Many species are brightly coloured in various shades of red or orange, while others are blue, grey or brown. Starfish have tube feet operated by a hydraulic systemand a mouth at the centre of the oral or lower surface. They are opportunistic feeders and are mostly predators on benthic invertebrates. Several species have specialized feeding behaviours including eversion of their stomachs and suspension feeding. They have complex life cycles and can reproduce both sexually and asexually.

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Animals · Sharks · water

Bamboo Sharks

DSCN2146Bamboo Sharks

Size: Up to 3.5 feet long
Habitat/Range: Shallow waters of tide pools and inshore coral reefs of the Indo-west Pacific region

A small shark with spots. Its dorsal fins are straight or convex rear margins, and its anal fin is set very far back on a very long, thick tail. Its first dorsal fin origin is opposite or just behind the pelvic fin insertions, and it has lateral ridges on its body.

COLOR
This shark has a pokie machines dark body with numerous light and dark spots, dark bands and saddles not conspicuously edged with black.

SIZE
When the shark hatches, it is about 3.54 to 4.72 inches [9 to 12 cm] in length. Females mature when they are 1.6 to 2 ft [50 to 60 cm], and the shark can reach a length of 3.1 ft [95 cm].

HABITAT
The shark prefers inshore waters. It is usually seen on the bottom, or on the reefs in the tropics.

DISTRIBUTION
Indo-west Pacific from Madagascar to Indonesia, the Philippines, and Japan.

(photos taken at Adventure Aquarium)