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, there are a number of exceptions. Let us say for instance, the Coscinasterias calamaria and Sunflower stars can have up to eleven arms and twenty-four arms respectively. Eyespots are contained in the arms of starfish that are sensitive to light and responsible for detecting motion.

One of the most interesting starfish facts is that they have the ability to regenerate any injured or lost arms throughout a particular period of time. National Geographic reports that there are a number of species whose arms are home to their vital organs. For that reason, limbs that have been separated from the body can be capable of regenerating on their own and eventually become new starfish over time.

Feeding a Starfish

Nowadays, marine scientists call starfish “sea stars”, since they are actually not fish, but echinoderms. There are more than two thousand species of sea stars. Most of them have five arms, but others are blessed with up to forty arms. The stomach and mouth of the starfish are located on its bottom. These animals usually push their stomachs from their bodies, wrapping them around the food for digestion. When learning how to feed a starfish, identify what type your starfish More...

Starfish Facts about their Habitat

People who want to learn more starfish facts should also look into the habitat and the areas around the world where starfishes can be found. One key fact that you should definitely know is that starfishes will never survive when not in water. You may see a few of them on the beach but if they do not get into the sea soon, they will have a major electrolyte imbalance within their bodies. This is directly related to the starfish’s 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...

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 on their Senses

Even if starfishes look very peculiar and different from the rest of the animals that you typically see, they still have typical body functions and processes that other animals commonly share. They also have senses such as seeing, touching, and smelling. These senses may be some starfish facts that you may not have heard before. In terms of vision, starfishes actually have vision sensors which are eyespots that are specially located at the far ends of the starfish’s arms. These More...

Starfish Facts on Reproduction

When it comes to starfish facts on reproduction, things can get a little bit interesting considering the fact that some species can regenerate and grow just from an arm. But the regeneration of one starfish coming from a single arm is under the asexual form of reproduction and only a few species will be able to do that. Regeneration usually requires majority of the central disc to be intact for most of the other species. In terms of sexual reproduction, More...

Starfish Facts on its Ancient History

When it comes to researching about starfish facts on their history, it is actually a very difficult process because starfishes are echinoderms and their species hardly leave any trace in their fossils aside from their external ossicles and spines. This makes it extra difficult for the researchers to spot and identify fossils that are strictly from the starfishes. But according to research findings, starfish fossils can be traced back to Ordovician which is roughly about 450 million years ago. There 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 How They Protect Themselves

When a prey is being stalked by predators, the first reaction of the prey is always to flee the scene. It will only be during compromising situations wherein the prey would start to be in fight mode. Unfortunately, starfishes cannot just escape from predators because most of them are generally slow. So they use numerous other defense mechanisms to protect themselves. According to the starfish facts gathered by zoologists, certain species of starfishes have a chemical coating in their bodies More...