Common name: Green Finger Algae

The Udoteaceae family, commonly known as Green Finger Algae or Mermaid's Wine Glass, includes calcareous green algae found in tropical and subtropical seas. These algae are characterized by their finger-like or goblet-shaped growths and are often found in shallow waters where they contribute to reef building. They can be a unique and attractive addition to reef aquariums, providing a natural look and aiding in nutrient export. Hobbyists should ensure adequate lighting and stable water conditions to promote their growth.

1. 
   Common name: Turtle Weed

   Scientific name: Chlorodesmis fastigiata
2. 
   Common name: Shaving Brush Alga

   Scientific name: Penicillus capitatus
3. 
   Common name: Mermaid's Wine Glass

   Scientific name: Penicillus dumetosus
4. Common name: Phoenix Worm Snail

   Scientific name: Rhipocephalus phoenix
5. 
   Common name: Mermaid's Fan

   Scientific name: Udotea flabellum
6. 
   Common name: Mermaid's Fan

   Scientific name: Udotea spinulosa