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The presence of fish is essential in maintaining the balance of algae growth on coral reefs, preventing the reefs from being overgrown and stifled. When fish are fed human food, their natural behavior adjusts, potentially leading to a situation where they neglect to graze on harmful algae, allowing it to proliferate unchecked. Notably, in Phu Quoc, certain tours permit guests to feed fish for recreational purposes. However, for a more profound comprehension of sustainable tourism practices, it is imperative to highlight the adverse effects of fish feeding and advocate against this practice.
MAIN CONTENTS
1. FISH-FEEDING CAN LEAD TO ALGAE SMOTHERING THE CORAL
One of the most significant threats facing the coral reefs in Phu Quoc is the proliferation of harmful algae. The daily influx of tourists, including uninformed snorkelers and scuba divers who feed the fish, is significantly disrupting the ecological equilibrium of the coral reefs on Phu Quoc Island.
While algae may not be appealing as a snack to humans, it serves as a fundamental dietary component for numerous fish species. By consuming algae, fish not only maintain their natural diets but also play a crucial role in regulating algae populations. Should fish seek alternative food sources, such as being fed by humans, unchecked algae growth on reefs could occur. This unchecked growth can lead to smothering and overgrowth of coral, ultimately resulting in coral suffocation due to the diminished nourishment provided by photosynthetic algae (Zooxanthellae).
2. IT LEAVES NESTS VULNERABLE TO PREDATORS
If you have witnessed a diver or snorkeler feeding fish, you are likely aware of the frenzied response it elicits. Fish swiftly converge on the food, engaging in competitive feeding to consume as much as possible. However, this collective predatory behavior, out of character for typically solitary species, can leave their nests unattended and susceptible to predators.
3. FISH CAN LEAD TO STARVATION
Feeding fish with inappropriate food items such as bread or pork might seem unconventional, but it can inadvertently lead to their starvation. Marine animals typically rely on a specific range of digestive bacteria for proper digestion. Introducing unsuitable food can disrupt this delicate balance, causing an overgrowth of unfavorable bacteria in their stomachs. Consequently, the fish may lose the ability to digest their natural diet, ultimately resulting in starvation.
4. CROWN-OF-THORNS CAN GROW OUT OF CONTROL
The Crown-of-Thorns starfish is a sea star named for the spines that cover its body and arms. These guys are well-known coral predators. Any diver who’s witnessed their path of destruction will know just how harmful they can be to coral reefs if population numbers get out of control.
Typically, the proliferation of the troublesome Crown-of-Thorns starfish is regulated by fish that inadvertently consume their eggs while foraging on algae. However, when these fish are fed with food by humans, they no longer rely on algae for sustenance. Consequently, this disruption in the natural balance allows predator populations to surge, resulting in significant harm to the reef ecosystem.
5. IT DISRUPTS THE BALANCE OF THE ECOSYSTEM
Coral reefs in Phu Quoc are currently facing a significant algae invasion, underscoring the necessity for snorkelers and divers to be well-informed about sustainable tourism practices to mitigate environmental impact. OnBird’s sustainable discovery snorkeling excursions strictly prohibit fish feeding, regardless of the perceived impact, ensuring a conscientious approach to marine conservation.
To prevent the smothering of coral reefs by algae growth, it is essential to regulate the algae population. By encouraging fish to feed on the harmful algae, their grazing behavior can be redirected, preventing overgrowth that could harm the reef ecosystem.