Coral Feeding
Coral feeding is the process by which corals capture, consume, and utilize food to support their nutritional needs. While many corals receive energy from photosynthesis through their symbiotic algae, feeding provides additional nutrients that are essential for growth, tissue development, coloration, and long-term health.
One of the most common misconceptions in reef keeping is that corals survive entirely on light. In reality, corals are animals and have evolved to actively feed on a variety of food sources found within the reef environment. Understanding how corals feed and what they consume is one of the keys to maintaining a thriving reef aquarium.
Why Is Coral Feeding Important?
Feeding provides corals with nutrients that photosynthesis alone cannot fully supply. These nutrients help support the biological processes required for growth, tissue repair, reproduction, and overall vitality.
Proper feeding can help support:
- Coral growth
- Tissue development
- Coloration
- Polyp extension
- Recovery from stress
- Reproductive functions
- Overall reef health
Many reef keepers find that feeding plays a significant role in helping corals achieve their full potential.
What Do Corals Eat?
Corals consume a wide variety of food sources in nature.
Depending on the species, corals may feed on:
- Zooplankton
- Phytoplankton
- Copepods
- Rotifers
- Bacteria
- Dissolved organic matter
- Marine proteins
- Suspended food particles
Different coral species have evolved to capture different types and sizes of food. Some rely heavily on feeding, while others receive a larger percentage of their energy through photosynthesis.
How Do Corals Feed?
Corals use specialized structures called polyps to capture food from the water column.
Many corals extend their polyps in response to food availability, allowing them to trap suspended particles and transport them to the mouth for digestion. Others produce mucus that helps collect nutrients drifting through the water.
Once consumed, the food is digested and broken down into nutrients that the coral can use for growth and biological function.
Feeding vs Photosynthesis
Coral feeding and photosynthesis work together to support coral health.
Photosynthesis provides energy through the coral's symbiotic algae, while feeding supplies many of the nutrients needed for tissue growth, repair, and metabolism.
Neither process should be viewed as a complete replacement for the other. Most healthy corals benefit from both energy pathways working together.
Common Coral Feeding Methods
Reef keepers commonly use two primary feeding methods.
Broadcast Feeding
Food is dispersed throughout the aquarium, allowing multiple corals to feed naturally as particles circulate through the water column.
Target Feeding
Food is delivered directly to individual corals using a pipette, turkey baster, or feeding tool.
Both methods can be effective depending on the coral species, food type, and goals of the reef keeper.
Common Misconception: More Feeding Equals Better Results
One of the biggest mistakes in reef keeping is assuming that feeding more always leads to faster growth.
Corals benefit most when they receive appropriate nutrition that can be efficiently captured and utilized. Excess feeding may contribute to nutrient accumulation, elevated nitrate and phosphate levels, and reduced water quality.
Successful coral feeding is about providing the right nutrition in the right amounts rather than simply increasing food volume.
The Bottom Line
Coral feeding is an essential part of reef nutrition that provides proteins, amino acids, fatty acids, vitamins, and other nutrients needed for growth and health. While photosynthesis supplies energy, feeding delivers many of the building blocks corals require to thrive. A balanced feeding strategy can help support healthier, more colorful, and more resilient corals in the reef aquarium.
