Emerald Crab

Emerald Crab: A Hardworking and Effective Algae Grazer

The Emerald Crab (Mythrax sculptus) is a highly valued member of any saltwater aquarium's clean-up crew. Known for its vibrant green coloration and bushy claws, this fascinating invertebrate is a workhorse when it comes to controlling nuisance algae, especially bubble algae ($$Valonia$$). Its constant foraging and active personality make it a great addition to your tank, providing both a useful service and an interesting display. The Emerald Crab is a hardy species that can adapt to a variety of marine environments, making it a popular choice for hobbyists of all experience levels.

Why the Emerald Crab is a Great Choice:

• Natural Algae Control: It is one of the few invertebrates known to actively graze on problematic bubble algae.
• Effective Forager: It will constantly scour your rockwork for uneaten food and other detritus, helping to keep your tank clean.
• Generally Reef-Safe: While its behavior should be monitored, it is a great candidate for most reef tanks and is not known to bother healthy corals.
• Hardy and Resilient: This species is easy to care for and can thrive in a well-maintained saltwater environment.

Quick Facts

• Scientific Name: Mythrax sculptus
• Origin: Western Atlantic Ocean and Caribbean
• Max Size: 2 inches
• Lifespan: 2-4 years
• Diet: Herbivore/Omnivore. Eats algae (especially bubble algae), detritus, and uneaten food.
• Shipping Size: 1 inch or larger