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Starfish

Starfish

About Starfish :
Starfish are also known as sea stars. They are good-looking animals that can be found in different colors, shapes and sizes, even though all look like a star. Some appear flat; they all have spines casing their upper surface and a soft underneath. If you quietly turn over a live sea star, you'll see its tube feet wiggling back at you. These iconic aquatic animals are charming creatures.

Physical features :
Though sea stars exist undersea and are usually called "starfish", they are not fish. They do not have gills, scales, or fins like other fish and they travel quite in a different way compared to marine fish. Instead, sea stars push themselves with their tails, as they have small tube feet to help them move along. The five-armed sea star is the most well-known, as not all sea stars have five arms. Some have more, for example sun star have 40 arms.

Reproduction :
Starfish generally reproduce using a process called free-spawning. This means that they discharge their gametes into the water, where they will be fertilized by the gamete from the opposed sex. Once fertilization has occurred, the egg grows from an embryo into a larva, which nourish on small algae. During its plankton phase, the larva proceeds through numerous developmental periods going from gastrula to bipinnaria. Towards the end of the last stage, the larva grows into a huge sack like structure.

Interesting facts about star fish :
Remarkably, sea stars can redevelop lost arms. This is helpful if the sea star is in danger by a predator. It can lose an arm and get away. Sea stars accomodate most of their crucial organs in their arms, so some can even regenerate a wholly new sea star from just one arm and a piece of the star's central disc. It does not happen too rapidly, though. It takes about a year for an arm to develop back.

Pink Starfish :
Pink starfish is scientifically known as Pisaster brevispinus. They are also called as the Pink Sea Star, Giant Sea Star, or Short-spined Sea Star.

Physical Features :
The color of the pink starfish is pink and the spines are less than 3 mm long, therefore the common name is given. Its width can be up to 62 cm. The Pink Star is a very remarkable color, a brilliant shade of pink. If this animal existed anywhere in dark it would most likely be eaten frequently, but it mixes right in to its brilliant coral reef home. The Pink Star can reach a width of two feet while weighing up to three pounds. It has supple, floppy texture that permits it to bend a little to stay on coral. They are generally found on sand or mud substrate where it grabs its prey such as clams and sand dollars.

About Blue starfish :
The Blue Starfish, also known by the common name as Blue Sea Star, or Blue Linckia Sea Star, is found in the sun-drenched areas of the reef and reef fringe, frequently foraging for food. It has a clear blue body, occasionally with red or purplish spots.

Giant star fish :
Giant sea stars or starfish measures 25 inches. They are also known as Giant pink starfish

Facts :

  • Family: Ophidiasteridae
  • Range: Indo-Pacific region
  • Size: Up to 13 inches
  • Diet: Omnivore animal
  • Reef friendly: yes