Dissecting a Starfish

When considering dissecting a starfish, you must understand that this creature is a sea animal with a proportional endoskeleton. It feeds on mollusks and moves with hundreds of extremely small tube feet. Now, prepare the necessary tools for dissecting the starfish. These include a probe, a scalpel, dissection tray, scissors and pins. You must wear goggles and protective clothing to cover yourself against debris.

Pin your starfish into the tray in such a way that its top view faces you. Use the scalpel for cutting off one ray’s tip. Create two parallel, long incisions between the tip and the central disk, with each incision being close to the ray’s edge. Peel off the top tissue layer and find the lateral canal (to which the tube feet connect) and ring canal (to which all the rays’ lateral canals attach) then label these portions.

Expose and label the digestive glands of the starfish. Find the stomach by eliminating tissue out of the central disk. After labeling the stomach, find the gonads. You cannot detect the starfish’s gender without using a telescope because the gonads of starfish males and females look alike. After dissecting the starfish and before cleaning up the work area, ask your instructor first if you have located all the required starfish parts by letting him see all your labels.

Structure of Body

Starfish is not really fish because fish is composed of backbones, fins and gills. Starfish is an echinoderm, which is an invertebrate that has a proportional radial body. Instead of scales, starfish species are mostly equipped with a leathery, rigid skin, which protects them against the attack of predators like birds and fishes. Calcium carbonate makes up the skin of all starfishes. Most of the starfish species are equipped with five arms, which extend out of a central point; nonetheless, More...

Flattening Dried Sea Stars

Dried sea stars can make a good inclusion in your beach- or ocean-themed handicraft project. Along with some shells, they can be placed on picture frames and mirrors, and even in glass-top tables and clear lamps. Moreover, a lot of crafters glue dried sea stars onto ornamental nets, which are utilized as hangings on the wall. It is possible to make a dried starfish flat by first rehydrating it then repositioning its limbs. You can make use of this method More...

Starfish Facts on its Importance in Nature

A lot of people see starfishes as cute animals by the seashore that you can pick up and take pictures of. But there is actually more to these creatures than just their appearances and colors. Not a lot of people understand starfish facts especially about their contribution to nature. Just like any other animal in the marine kingdom, they contribute a lot in Eco diversity and in keeping the food chain running. Scientists and biologists actually called starfishes as keystone More...

Handling Dead Sea Stars

Also referred to as sea stars, starfish are marine echinoderms that you can find on tide pools and beaches across the globe. National Geographic reports that there are more than two thousand species of starfish, though they all have the same physical appearance, which is composed of brittle and boney calcified skin. In the event that you find this creature, either dead or alive, you must handle it very carefully so that its fragile arms, will not be injured or More...

Central Disc of Starfish

Starfish have the capability of re-growing partial bodies or lost arms, after they experience an injury. They typically do this to either reproduce or heal wounds. If you cut a sea star into five sections, each containing a portion of its central disc and an original arm, five new sea stars will be born. For the most part, a sea star can never clone itself except when the targeted clone has a section of the central disc. As the name More...

Starfish Facts on Physical Characteristics

When you look at a starfish, you can easily be captivated by its appearance. There are thousands of species of starfishes that you can find and only a few of them are those that you see on the shorelines. Most of them are found on the seabed where they can easily catch prey. The seabed is also where you can find species of starfishes with very interesting physical features. One of the starfish facts about its appearance is that the More...

Is your Starfish Still Alive or Already Dead?

In order to tell whether a starfish is alive or dead, you need to observe it. Starfishes do not move frequently, but they move whenever they are fed. The starfish is alive if it is moving. Now, wear a pair of gloves that are waterproof. Gently scoop up the starfish without getting it out of the water. The animal can be stressed by any sudden alterations in its environment, and caused to start disintegrating or to shed their limbs. Being More...

Other Cool Starfish Facts

There are various marine creatures, such as manta rays and sharks, which can prey on starfishes and penetrate their solid skin. There are species of birds that can feed on starfishes, which come too close to the water surface. The larger starfish species may sometimes feed on smaller marine species. The lifespan of a starfish can be up to thirty-five years if it is able to get away from its numerous predators. What makes the starfish very different from most More...

Starfish Facts

Starfish, also popularly recognized equally as sea stars, common name for 5 orders and about 1500 living species of marine invertebrate characterized by radially arranged arms having locomotory tube feet. Actually, starfish cannot be considered as fish in spite of the name provided to these sea animals. Some known starfish facts are that they belong to the group called echinoderms. They can be found in great numbers in the depths of the ocean and as well as in shallow waters. More...