Red Razorback Macroalgae

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

Care Information

Special Considerations

🔍 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.