Opae ula

Opae Ula (Halocaridina rubra)

The Ultimate Low-Maintenance Pet Shrimp

Opae Ula, also known as Hawaiian Volcano Shrimp or Supershrimp, are one of the hardiest and most fascinating invertebrates available in the aquarium hobby. Naturally found in anchialine pools on Hawaii’s volcanic islands, these tiny red shrimp thrive in brackish water and are incredibly long-lived—often surviving 15–20 years with minimal care.

Perfect for desktop eco-spheres or nano aquariums, Opae Ula require very little feeding and are highly resistant to fluctuations in water quality. Their slow metabolism and self-sustaining behaviour make them a favourite for aquarists looking for a beautiful, self-maintaining aquatic pet.

Quick Facts:

• Scientific Name: Halocaridina rubra

• Common Names: Opae Ula, Hawaiian Red Shrimp, Supershrimp

• Adult Size: 1.5 cm

• Temperature: 18–28°C

• pH Range: 7.5–8.5

• Salinity: Brackish (SG 1.010–1.014)

• Lifespan: 15–20 years

• Tank Size: 1L+ (Nano-safe)

• Diet: Algae, biofilm, occasional micro-pellets

• Origin: Hawaii

Care Level: Extremely Easy

Community Safe: Yes, but best kept in species-only setups
Ideal For: Eco-spheres, nano tanks, classrooms, and minimal-maintenance displays
Behaviour: Peaceful, slow-moving, hardy