From ReefPedia

[edit] Padina Benefits: Breaks down into calcified substrate, is a known heavy metal absorber Drawbacks: None known Invasiveness: Low Hardiness: medium Growth Rate: medium Availability: Rare,

pic coming soon

Introduction

A fan shaped encrusting algae that grows in concentric rings

Common Names

Onion Ring Mermaids Fan

Scientific Names

Padina sp. Phylum-phaeophyta

          Class-dictyotaceae
          Order-dictyotales

Is it a Pest?

not considered a pest

Known Predators

Low. not a fish friendly algae

Cultivation

A bit about cultivating this algae please

FAQ

Unusual example of a brown algae that is calcified, fairly common on oceanic reefs in moderate exposure. Used in animal and human food and drugs