2026-04-19T19:22:07-07:00

Type: MACROALGAE
Price: 29.99 - 109.99 (2 variants)

Red Razorback Macroalgae

Red Razorback Macroalgae (Amansia sp., provisionally) is a rare and visually striking Australian red macroalgae that brings extraordinary texture and structure to the reef display. Its defining feature is immediately apparent — flat, pinnate blades arranged along central stems like feathers, each one edged with dramatic razor-sharp serrations that run the full length of every margin. The combination of that precise, tooth-like fringing against the deep crimson red body creates a visual complexity and detail that very few macroalgae can match.

In the tank, Red Razorback grows into a dense, full, bushy form — multiple stems producing their pinnate blade arrangements in a rich overlapping mass of deep red. Under reef lighting the serrated edges catch light differently from the blade surface, creating a subtle two-tone effect that adds remarkable depth to the display. In moderate flow the blades move gently and independently, adding constant living animation to the aquascape.

Sourced from Australian waters and rarely encountered in the hobby, Red Razorback is a genuine collector's specimen — a macroalgae with the kind of structural detail and visual complexity that rewards close inspection and never gets old.

Available Options

Starter Plant

Younger specimen with established pinnate blade structure and full crimson coloration

Ideal for grow-out or adding to a display with room to develop into a full bushy colony

A rare opportunity to acquire this Australian species at an accessible entry size

Mature Colony

Fully developed specimen with dense, overlapping pinnate blade arrangement

Maximum structural complexity and rich red coloration on full display from day one

Ready to place directly into your system as an immediate centerpiece

Care Information

💡 Lighting
Moderate — full spectrum recommended

🌊 Water Flow
Low to Moderate, gentle and indirect

📍 Placement
Rock-mounted — mid to lower display zones

⚙️ Care Level
Moderate — stable parameters recommended

📈 Growth Rate
Moderate — controlled and non-invasive

🧪 Nutrient Export
Moderate nitrate and phosphate uptake

Special Considerations

Red Razorback performs best in stable, established systems with consistent water parameters and gentle indirect flow. The pinnate blade structure can trap detritus in low flow areas — ensure adequate gentle circulation around the specimen. Keep away from aggressive herbivores including urchins and large tangs that will graze on the blades. Supplement with iron and iodine as part of a regular micronutrient dosing schedule to maintain the rich red coloration. Handle gently during placement to avoid breaking the delicate pinnate blade arrangements.

🔍 Aquarium Insights

Red Razorback is a standout addition to any reef or macro display:

The razor-sharp serrated blade edges create a level of structural detail and visual complexity rarely seen in display macroalgae

The dense pinnate arrangement builds into a rich, full colony that becomes more impressive over time

A rare Australian collector's specimen — functional, beautiful, and genuinely hard to source anywhere else

Learn More

For detailed species information, compatibility, and care tips, visit our Species Library.

Livestock Disclaimer
Due to natural variation, the specimen you receive may vary slightly in blade arrangement, coloration, and size. Photographs are representative examples.

Individual specimens may display differences depending on lighting, flow, and tank conditions.

Size and appearance are provided as general guidelines and may vary slightly from the specimen received.