Why You Shouldn’t Feed Wild Fish?

Posted on February 28, 2025May 25, 2025 by Annabel Thomas

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6 Reasons Why You Shouldn’t Feed Wild Fish

by Fahmi, AMD-B’s 2024 Divemaster Intern

Feeding wild fish might seem like a harmless activity, but it can have some unintended consequences for the fish and their surroundings. Whether it’s tossing bread into the water or offering food while snorkelling, feeding wild fish can change their natural behaviours, affect the environment, and impact the balance of the ecosystem. Here’s why it’s best to let wild fish find their own food.

Disrupting Natural Diets

Wild fish are adapted to eat what’s naturally available in their environment. When we introduce foods like bread or snacks, it can disrupt their diet and lead to nutritional issues. For example, bread doesn’t provide the nutrients fish need and can cause digestive problems. Over time, fish that are regularly fed by humans might start relying on these easy food sources, rather than finding their natural prey.

Spreading Disease

Feeding fish can also increase the spread of disease. When fish gather in one spot to eat, they’re more likely to come into contact with each other, which can lead to the spread of diseases and parasites. The food we provide might also introduce bacteria into the water, potentially affecting other marine life.

Disrupting Ecosystem Balance

Marine ecosystems rely on a balance between different species. Feeding wild fish can disrupt this balance. When fish populations grow because of feeding, it can lead to overgrazing of certain plants or a decrease in their natural prey. This imbalance can have effects that ripple through the ecosystem, affecting other species as well.

Changes in Behaviour

Fish that become accustomed to being fed by humans may start approaching people more often, expecting food. This change in behaviour can be problematic in some situations, especially if it affects the natural behaviour of the fish or leads to them becoming more dependent on human interaction.

Impact on Coral Reefs

Feeding wild fish in coral reef areas can be particularly harmful. Many reef fish help maintain the health of coral reefs by eating algae and keeping the ecosystem in balance. When these fish are fed by humans, their natural behaviour changes, which can lead to algae overgrowth that harms coral.

Legal and Environmental Considerations

In many places, feeding wild fish is restricted or not allowed due to the potential impact on the environment. Marine protected areas and conservation zones often have rules against feeding wildlife to help maintain the natural balance of the ecosystem. Respecting these rules supports the efforts of those working to protect these areas.

Dive Course: Open Water Diver

Posted on February 21, 2025May 15, 2025 by Annabel Thomas

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Open Water Diver Course

Open Water Diver Course is a great way to attain the first required certification to dive internationally.

Through the PADI Open Water Diver Course, you’ll learn the fundamentals of scuba diving, including dive theory, equipment and techniques, over the course of 2 or 3 days. The certification is recognised worldwide and is earned by completing:
– Five Knowledge Development (theory) sessions – these can be done online.
– Five Confined Water (pool) sessions to practise scuba skills, learn to breathe underwater and familiarise yourself with your scuba gear.

Then it’s time for your four Open Water (sea) dives on Bali’s beautiful east and north east coast reefs (including the famous 120m USAT Liberty Shipwreck in Tulamben Bay!).

The Theory

With PADI eLearning, you can complete the dive theory wherever and whenever you want, while going at your own pace. You’ll then be fully-prepared when you meet your AquaMarine PADI instructor and can start diving straight away. Alternatively you can buy an Open Water manual from your local dive shop or we’ll deliver one to you when you arrive in Bali. Complete the theory by the pool, on the beach, or in the shade of a convenient palm or mango tree!

Your Open Water Dives

AquaMarine recommends doing your Open Water dives in Tulamben Bay (we believe this is where you’ll really fall in love with diving) to experience shore diving. And in Blue Lagoon just outside Padangbai on Bali’s east coast for boat diving, rather than at the inferior reefs, with more difficult conditions, in the south of Bali.

Because the course is performance-based, you get as much time as you need to practise your new skills prior to certification. You can choose our 2 or 3 day OWDC schedule. Above all, AquaMarine’s instructors will ensure that not only is your course low-stress and safe, but you will have great fun, too.

The PADI Open Water Diver Course (and PADI Junior Open Water Diver Course) is your ticket to dive anywhere at any time. Once you discover how easy and fun scuba diving is, you’ll want to share it with friends and family. Bring them along to try the PADI Discover Scuba Diving, or the PADI Open Water Diver Courses.

Coral Predators

Posted on January 17, 2025January 17, 2025 by Annabel Thomas

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Coral Predators

by Fahmi, AMD-B’s 2024 Divemaster Intern

Coral reefs are vibrant ecosystems, and like any environment, they have species that interact in different ways. Some creatures feed on corals as part of the natural balance of life on the reef. While it might seem concerning at first, this predation is usually just a part of maintaining a healthy ecosystem.

Key Coral Predators

Crown-of-Thorns Starfish (COTS):
The Crown-of-Thorns Starfish is one of the most well-known coral predators. These spiny creatures feed on coral polyps, digesting the living tissue and leaving behind the skeleton. While they’re a natural part of the ecosystem, outbreaks can lead to significant damage to coral reefs.

Parrotfish:
Parrotfish are famous for grazing on coral. Their strong, beak-like teeth allow them to scrape away pieces of coral, which they digest and later excrete as sand. While this sounds harmful, they also help control algae, preventing it from overtaking the reef. In moderation, their coral consumption is part of the reef’s healthy balance.

Drupella Snails:
These small snails feed on coral polyps and can leave marks on the coral. They usually don’t cause widespread damage but can be a part of the natural predation cycle on reefs.

Butterflyfish:
These colorful fish feed on soft corals and polyps. Their impact is relatively minor, and they’re another example of how coral predation is part of the reef’s life cycle.

When Populations Get Out of Control

In most cases, coral predators are just a part of reef life. However, when their populations grow too large, they can cause significant harm. One example is the Crown-of-Thorns Starfish outbreaks. These outbreaks occur when the starfish population spikes, often due to factors like pollution or overfishing of their natural predators. During an outbreak, the starfish can consume large areas of coral, leaving behind dead coral skeletons.

Such outbreaks can severely weaken coral reefs, making them more vulnerable to other threats like climate change, ocean acidification, and storms. When the balance shifts too far, the reef can struggle to recover.