In the vast oceans of the world, there exists a group of unassuming yet mysterious creatures known as starfish.

These small beings conceal many astonishing traits and lifestyles, and today, we delve into uncovering the veil of mystery surrounding starfish.

1. Species and Appearance

Starfish are a type of echinoderm with radial symmetry, classified under the phylum Echinodermata, encompassing over two thousand species.

Despite their name suggesting a star-like shape, they come in various forms—pentagonal, hexagonal, heptagonal, and even more complex shapes. The most familiar may be the pentagonal starfish, which often displays deep shades of red, blue, or orange, emitting a charming luster.

2. Habitats

Starfish are widely distributed across the seabeds of all major oceans, from shallow to deep waters. They are primarily benthic creatures, relying on suction cups to adhere to rocks or the seabed.

Their mode of movement is unique; they utilize a hydraulic system to crawl, capable of covering distances ranging from a few centimeters to several tens of centimeters per minute. Despite their seemingly clumsy appearance, they navigate their underwater "homes" with remarkable ease.

3. Unique Feeding Habits

Starfish do not prey in the traditional sense—they lack teeth and swift movements.

However, they possess a distinctive and efficient feeding technique. Their stomach is located externally; they evert it and insert it into their prey, secreting digestive enzymes externally to dissolve the prey's tissues, then sucking in the liquefied food for digestion internally. This "extrusion" digestion method makes starfish adept predators, capable of capturing mollusks and bivalves with ease.

4. Reproductive Mysteries

Starfish exhibit diverse reproductive strategies, reproducing through spawning or egg-laying. Some starfish also possess regenerative abilities, able to regenerate new bodies after losing one or more arms. This unique regenerative capability enhances their survival in challenging environmental conditions.

5. Human Interaction with Starfish

While starfish play crucial roles in scientific research and marine ecosystems, they are not commonly featured in human culture.

However, in recent years, awareness of marine conservation has grown, leading to increased interest in starfish. Some regions have initiated programs for observing and protecting starfish, aiming to educate and raise awareness about these charming marine creatures.


Starfish, while seemingly ordinary, hold profound biological mysteries and ecological roles that are truly remarkable.

Their lifestyle, feeding techniques, and interaction with the environment not only showcase the marvels of nature's design but also serve as a reminder of the importance of human coexistence with the Earth. It is hoped that in the future, we can pay more attention to and protect starfish, allowing them to continue playing crucial roles in the marine world.