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 was also evidence that numerous species of starfishes became extinct as scientists were able to find starfish beds amid fossil layers. Thankfully, starfishes have the ability to quickly diversify their own species. The surviving species were able to evolve rapidly that they were able to morph new species from themselves.

The unique thing about starfishes and their echinoderm ancestors is that the ancient echinoderms were believed to be symmetrical in a bilateral fashion which is unlike the radial symmetry that starfishes evolved to be. But the radial symmetry of the starfishes today does not imply that they have stemmed from the same ancestors as jelly fishes which also have radial symmetrical bodies. Today, there are over 1,500 recorded species of starfishes that are still living.

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...

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...

External Threats

The greatest threat to starfish is similar one which endangers most other seawater animals: human beings. Starfish needs clean and clear water as its habitat. When humans permit water pollutants to flow into the seas and oceans, these species can get extremely unhealthy and even die. In addition, there are several cultures that allow the eating of starfish. In case too many starfishes are brought away from any area, these beautiful seawater creatures will be deprived of the opportunity to More...

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. More...

Starfish Facts on their Diet

Starfishes are among the most fun- looking marine animals that kids really want to pick when they go to the beach. Because of their appearance, people get more interested about these animals. One of the common questions about starfish facts that kids ask is about the food and the diet of starfishes. The diet of these sea creatures is actually quite interesting because of the variety of food that they eat. There are more than one species of starfishes in 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...

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...