Frogspawn Coral: A Comprehensive Guide for Aquarists

Frogspawn Coral, scientifically known as Euphyllia divisa, is a beautiful and eye-catching addition to any aquarium. This large polyp stony coral, native to regions like Southeast Asia, Fiji, and Australia, is a favorite among aquarists due to its easy care requirements and mesmerizing flowing movement.

As you venture into the world of Frogspawn Coral, you’ll discover their wide range of colors, with green and yellow being the most common. The unique appearance of their tentacles with different-colored tips adds an enchanting beauty to your underwater display.

In the coming sections, we’ll guide you through their care, requirements, and how to provide a healthy environment for this captivating coral. Let’s learn all about this spectacular inhabitant of the underwater world.

Frogspawn Coral Overview


Frogspawn Coral, scientifically known as Euphyllia divisa, is a large polyp stony (LPS) coral that can be found in various locations around the world. Some of these places include Australia, Fiji, Southeast Asia, the Solomon Islands, and the Ryukyu Islands.

Size and Shape

In aquariums, the Frogspawn Coral’s size ranges from a few inches to over a foot in diameter, depending on your tank conditions and the coral’s maturity. The polyps of this coral species are large and fleshy, resembling fish or frog eggs, which is where the name originates. The polyps remain open both day and night, and the tentacles extend to capture food.

Color and Markings

Frogspawn Corals display a wide range of colors and markings, making them an attractive option for reef aquascapes. Common colors include green, brown, and tan, with contrasting tentacle tips that resemble frog eggs. Some varieties also showcase metallic or vibrant shades, which can make them stand out in your aquarium.


There are two main types of Frogspawn Corals that you may come across: the Wall Frogspawn Coral and the Branching Frogspawn Coral. The Wall Frogspawn has large, flat polyp sections, whereas the Branching Frogspawn has a more spread-out appearance with thinner branches. Both types can thrive in well-maintained saltwater reef aquariums, provided they are given proper care and appropriate tank conditions.


Feeding your frogspawn coral is quite simple as it doesn’t require much target feeding. In fact, it’s best to avoid feeding larger foods to prevent retraction and the possibility of them being stolen by other tank inhabitants. Instead, broadcasting brine shrimp, zooplankton, and coral foods like Reef Roids are suitable options for feeding if desired. It’s recommended to feed your frogspawn coral once a week, as this will prevent nutrient buildup and overfeeding provides no significant benefit.

Remember that light, flow, and water quality are more important factors for the growth rate of frogspawn coral than feeding alone. In their natural habitat, frogspawn coral obtains nutrients from organic matter, food particles, and algae. Common food options you can provide for your frogspawn coral include brine shrimp, micro-plankton, protein-rich frozen foods, and occasionally pellet foods.

Don’t be afraid to experiment with pellet foods. As long as it doesn’t negatively impact your water quality, there’s no harm in trying. Just maintain a friendly and consistent approach in caring for your frogspawn coral, focusing on providing the right conditions and regular feeding to facilitate healthy growth.

Care and Tank Requirements

Tank Size

As a reef hobbyist, it’s crucial to provide a suitable environment for your Frogspawn coral. A key factor in its care is the tank size. Your coral needs enough room to grow and thrive, so an ideal tank size for Frogspawn coral is at least 30 gallons.

Water Parameters

Maintaining stable water conditions is essential for the health of your Frogspawn coral. Aim for the following parameters:

  • Temperature: 72° to 78°F
  • pH: 8.1 to 8.4
  • Water hardness: 8 to 12 dKH
  • Specific gravity: 1.022 to 1.025

Regularly test these parameters with a reliable kit to ensure they stay within the recommended levels. Be mindful of the water flow, too. Frogspawn coral prefers a moderate flow, as high flow can negatively impact growth and polyp health.

Tank Setup and Decorations

When setting up your tank, focus on proper placement for the coral to ensure a constant flow of nutrients. Average lighting is suitable for Frogspawn coral, but be cautious of sudden changes in lighting, as the coral can react poorly.

Regular water changes are important for maintaining water quality and nutrient balance. While Frogspawn coral mainly relies on photosynthesis, occasional target feeding with small meaty foods like brine shrimp or mysis shrimp can be beneficial. Remember that Frogspawn has long sweeper tentacles that can sting other corals, so leave enough space between them to prevent aggression.


Frogspawn coral has no special filtration requirements and can thrive with common filtration methods. However, stable water conditions are crucial. Keep nitrates below 40 PPM, phosphates below 0.1 PPM, and ensure proper levels of magnesium, calcium, and alkalinity. Large colonies may require dosing of reef elements, and consistent water testing is vital.

You should be mindful of coral compatibility when placing your Frogspawn coral in the tank. Consider its aggressive nature and potential interactions with other corals and invertebrates. Ensure proper acclimation when introducing the coral to the tank, use gloves or forceps when handling the coral to avoid damage, and quarantine new corals before adding them to your tank to prevent the spread of diseases or pests.

Remember, patience and consistent care will lead to better long-term results for your Frogspawn coral. Regularly observe its health and growth, noting any changes in color, polyp extension, or tissue recession, as these can indicate potential issues. With a friendly approach and dedication, you’ll help your Frogspawn coral thrive in its aquatic home.

Frogspawn Coral Placement

When choosing the perfect spot for your Frogspawn coral, it’s important to consider a few factors to ensure its health and growth.

First off, remember that your coral loves moderate water flow. You don’t want a spot with too much flow, as this can cause the coral polyps to retract and possibly get damaged. Conversely, areas with too little flow won’t provide enough oxygen for healthy growth.

Lighting is another key factor. Aim for a location that receives moderate light. Keep in mind that too much light may harm the coral, while too little light won’t support growth.

Lastly, consider the coral’s potential growth. Frogspawn coral has long, sweeping tentacles that can sting neighboring corals. Make sure to leave enough space between your Frogspawn coral and other corals in the tank to prevent conflicts in the future.

By keeping these factors in mind, you’ll create the ideal environment for your Frogspawn coral to thrive.

Suitable Tank Mates

Frogspawn Coral is a beautiful addition to your reef tank, but it’s important to carefully choose its tank mates. Here’s a list of suitable tankmates for your Frogspawn Coral:

  • Clownfish
  • Chromis
  • Firefish
  • Blennies
  • Gobies
  • Dwarf Angelfish
  • Fairy Wrasses
  • Tangs

Remember, these creatures are generally safe to share a home with your Frogspawn Coral, and they can peacefully coexist in a thriving aquatic environment. However, always monitor the interactions between your coral and its tankmates to ensure that they stay harmonious.

On the other hand, there are some tankmates you should avoid when keeping Frogspawn Coral. These include:

  • Large Angelfish Species
  • Butterflyfish
  • Parrotfish
  • Triggers

These fish may cause harm to your Frogspawn Coral by nibbling on it or by being overly aggressive. Keep an eye on them in your tank to avoid any problems and ensure a healthy, stress-free environment for your coral.

Propagating Frogspawn Coral

As a friendly reminder, propagating frogspawn coral can be a great way to maintain a thriving reef tank. The first step is to determine the type of Euphyllia divisa you have, as branching and wall frogspawns have different fragging methods.

For branching varieties, follow these steps:

  1. Select a healthy piece of coral with good polyp visibility and no visible damage.
  2. Use a clean, sharp bone cutter or electric saw to cut underneath the flesh and before the branch.
  3. Dip the fragged coral in iodine and place it in a low-stress environment within your aquarium.

Wall frogspawns are more challenging, but you can still attempt propagating with these steps:

  1. Choose a healthy coral piece free from damage and with good polyp visibility.
  2. Carefully use a saw to cut through a majority of the flesh, taking extra precautions to avoid unnecessary harm.
  3. Treat the coral with iodine and place it in a low-stress environment in your aquarium.

Once you have prepared your fragged coral piece, anchor it to a rock or plug in a suitable location within your tank. Follow proper frogspawn coral placement principles, and your propagated coral should thrive without requiring additional care. Remember to always prioritize the wellbeing of your coral and enjoy the process of cultivating a stunning reef tank!

Common Diseases and Treatments

Your Frogspawn Coral, being a hardy Large Polyp Stony (LPS) species, can still quickly succumb to diseases if the delicate tentacles are not well-protected. Scraping against rocks or exposure to high water flow can cause stress or a brown jelly infection, consequently leading to rapid coral death.

To prevent diseases, it is recommended that you perform an iodine or coral bath and quarantine any new corals for a few weeks. This measure will help you avoid bringing pests into your aquarium, which is a common concern when introducing new corals. Although coral dips and quarantine can be helpful, pests like flatworms, Aiptasia, isopods, and amphipods may still be introduced.

When treating potential diseases, remember to be friendly to your aquarium inhabitants, ensuring a stable, healthy environment for your Frogspawn Coral and other species. By being vigilant and proactive in preventing and addressing common diseases, you can maintain a thriving and beautiful aquatic ecosystem.

Frequently Asked Questions

Is Frogspawn a good beginner coral?

Yes, Frogspawn corals are a suitable choice for beginners in saltwater aquariums. They are generally hardy and can tolerate a range of water conditions, making them a forgiving coral option for those new to the hobby.

Where should I place my Frogspawn coral?

Frogspawn coral should be placed in the middle or bottom area of your reef tank. Ensure there is ample space around it, as its tentacles can extend and sting neighboring corals. Keep it away from strong water currents to avoid stress on the coral.

What is the disease in Frogspawn coral?

The most common disease affecting Frogspawn corals is brown jelly disease. It is caused by a bacterial infection, leading to the release of a brownish jelly-like substance and the coral’s tissue deterioration. To prevent this disease, maintain optimal water conditions and treat any infections promptly.

How long does it take Frogspawn coral to grow?

Frogspawn coral growth rate can vary depending on tank conditions and the individual coral’s health. With proper care, lighting, and water flow, Frogspawn can show growth within a few weeks to a few months.

How much light does Frogspawn coral need?

Frogspawn corals require moderate light levels. A balance of blue and white spectrum lighting is beneficial for their growth and coloration. Make sure to acclimate your coral to the light gradually and adjust the intensity based on your specific tank conditions and coral’s needs.

What kind of water flow do Frogspawn corals prefer?

Frogspawn corals prefer moderate and indirect water flow. Too strong or direct water flow can cause stress on the coral and damage its delicate tentacles. Proper water circulation around the coral can help promote its growth and filter out any waste or debris accumulated around it.