When a starfish is removed from its aquatic habitat, it faces a number of challenges that can ultimately lead to its death. One of the main reasons is the inability to exchange gases, particularly oxygen and carbon dioxide, which is essential for their survival.
In the water, starfish rely on specialized structures called dermal gills to capture oxygen from the surrounding environment. These gills are located on the surface of their body and allow for the diffusion of gases. The starfish pumps water over these gills using tiny tube feet, facilitating the exchange of oxygen and carbon dioxide.
However, when a starfish is taken out of the water, the gills are no longer in contact with oxygen-rich water. This means that the starfish cannot obtain the necessary oxygen for respiration, leading to a lack of oxygen in their body. This condition, known as hypoxia, causes the starfish to suffocate, much like humans would if deprived of oxygen.
Furthermore, when starfish are removed from their aquatic environment, they also face the risk of intoxication. In the absence of water, their waste products, primarily carbon dioxide, accumulate in their body. This buildup of carbon dioxide can lead to a toxic environment, disrupting normal bodily functions and further contributing to their demise.
Additionally, starfish rely on water to maintain their body structure and movement. Without the buoyancy and support provided by water, their bodies become limp and unable to function properly. Their tube feet, which are essential for locomotion, become ineffective on land, leaving the starfish immobile and vulnerable.
Moreover, starfish have a delicate water balance that is maintained by their specialized body structures. Being out of water disrupts this balance, causing dehydration and electrolyte imbalances. Without proper hydration, their cells are unable to function, leading to organ failure and ultimately death.
It is important to note that the specific time it takes for a starfish to die when removed from water can vary depending on the species, environmental conditions, and individual resilience. Some starfish may be more tolerant of being out of water for short periods, while others may quickly succumb to the challenges mentioned above.
Starfish die when removed from their aquatic habitat primarily due to the inability to exchange gases, leading to suffocation and the accumulation of toxic waste products. Additionally, the lack of water support, dehydration, and electrolyte imbalances further contribute to their demise. It is crucial to handle starfish with care and return them to their natural habitat promptly to ensure their survival.