Red Giant Carpet Anemone (Stichodactyla gigantea) M/L

Overview

The Red Giant Carpet Anemone, Stichodactyla gigantea, is one of the most impressive and sought-after anemones in marine aquatics. Known for its broad oral disc, densely packed sticky tentacles and vivid colouration, this species creates a true centrepiece in a mature reef aquarium. The red form is especially eye-catching, bringing intense colour and a natural, high-impact look to the display.

This is an expert-level anemone best suited to established marine systems with strong lighting, excellent water quality and stable parameters. Like all carpet anemones, S. gigantea can move if unhappy, and it has a powerful sting that can affect nearby corals and tank mates. In the right setup, however, it is a spectacular and rewarding species to keep. Our live stock is shipped with a live arrival guarantee and fast UK delivery for added peace of mind.

Because this species can grow large and has specific environmental needs, it is recommended only for aquarists with experience keeping anemones and reef livestock. The M/L size offered here is a substantial specimen that will need a suitably large, mature aquarium with strong flow, intense light and careful placement.

Care at a Glance

Origin & Natural Habitat

Stichodactyla gigantea is found in the Indo-Pacific, including tropical reef environments across areas such as the Red Sea, the Indian Ocean and the western Pacific. In nature it typically inhabits shallow lagoon and reef-flat zones where bright sunlight penetrates the water and movement from waves and currents is constant. It often attaches to sand, rubble or hard substrate in areas with excellent water exchange.

This natural habitat explains much of its care in captivity. It needs intense illumination, stable salinity, clean water and strong but not blasting flow. In the wild, the species often hosts clownfish, which may live among the tentacles for protection. The anemone’s broad disc and adhesive tentacles are adapted to catching passing prey and anchoring securely in dynamic reef conditions.

Tank Setup & Water Parameters

For best results, house Stichodactyla gigantea in a mature marine aquarium with a stable biological filter and no major swings in temperature, salinity or nutrient levels. This species is not suitable for newly set-up tanks. A tank of at least 300 litres is recommended, though larger systems are preferable due to the anemone’s eventual size and the need to keep other livestock at a safe distance.

Provide very strong reef lighting, ideally high-output LED or equivalent, as this species relies heavily on light and will often expand and colour up best under intense illumination. Flow should be strong and varied, enough to keep detritus from settling on the oral disc, but not so direct that the anemone is constantly forced to retract. A stable rock structure or a secure sandy area with adjacent rock is ideal, as the animal may choose to anchor its foot in a crevice while spreading across the substrate.

Water quality must be excellent. Keep ammonia and nitrite at zero, nitrate as low as practical, and maintain consistent salinity around 1.024–1.026. Regular water changes, efficient protein skimming and careful feeding all help maintain long-term health. Carpet anemones are sensitive to poor conditions and can deteriorate quickly if stressed, so routine observation is essential.

Recommended parameters:

• Temperature: 24–28°C
• Salinity: 1.024–1.026 SG
• pH: 8.1–8.4
• Alkalinity: stable reef levels
• Ammonia/Nitrite: 0

When first introduced, allow the anemone time to settle without excessive handling. It may move to find its preferred light and flow. Protect powerheads and overflow intakes with guards, as wandering anemones can be damaged by pumps.

Feeding Guide

Stichodactyla gigantea is a carnivorous predator that benefits from regular target feeding once settled. In a well-lit reef aquarium, it will also use photosynthesis via its symbiotic zooxanthellae, but supplemental feeding supports growth, colour and resilience. Offer small portions of marine meaty foods such as chopped prawns, mussel, squid, fish flesh or quality frozen marine preparations.

Feed sparingly, typically once or twice per week, and only when the anemone is fully expanded and responsive. Overfeeding can lead to water quality issues, so portions should be modest and removed if not accepted. Juvenile or newly imported specimens may appreciate smaller, more frequent feedings, while larger established individuals can be fed less often.

Avoid feeding oily, freshwater or processed foods. Consistency and water quality are more important than heavy feeding. In strong light and stable conditions, this species can thrive and grow into a truly impressive showpiece.

Tank Mates / Compatibility

This species is best kept with peaceful, reef-safe fish that will not nip at the tentacles or disturb the anemone. Clownfish are the classic companions, and many species may host in S. gigantea if introduced carefully. Suitable tank mates include tangs, gobies, blennies, cardinals and other calm marine fish that respect the anemone’s space.

Because the tentacles are highly adhesive and strongly stinging, avoid corals and sessile invertebrates placed too close. Other anemones should not be housed nearby due to competition and stinging interactions. Aggressive fish, butterflyfish known to nip, large wrasses and species that may pick at the oral disc should also be avoided. Provide ample spacing so the anemone can expand without contacting neighbours.

Always remember that anemones can move, especially while acclimating. Any tank mates should be chosen with the expectation that the anemone may relocate. A mature reef with plenty of open space is the safest environment.

Why Buy from Tropical Fish Co

At Tropical Fish Co, we understand that live marine animals need careful handling, expert packing and reliable delivery. That is why we offer a live arrival guarantee and fast UK delivery, helping your new anemone arrive in the best possible condition. Our stock is selected with care, and we aim to provide healthy, well-conditioned specimens suitable for experienced aquarists.

We also know that buying a species like Stichodactyla gigantea is a serious commitment. Our product information is designed to help you make an informed choice, and our team is here to support you with practical advice on acclimation, placement and long-term care. If you are looking for a dramatic, premium marine centrepiece, the Red Giant Carpet Anemone is a truly exceptional choice for a mature reef system.

Choose Tropical Fish Co for quality livestock, careful service and dependable delivery across the UK.