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Opae Ula

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description Opae Ula Overview

Opae ula are small, bright red shrimp native only to Hawaii’s unique anchialine pools. These endemic atyidae shrimp are notable for their remarkable longevity and ability to thrive in extremely brackish, low-oxygen environments. They are primarily kept as ornamental aquarium inhabitants, offering a fascinating glimpse into specialized aquatic life and requiring careful husbandry due to their sensitive needs.

help Opae Ula FAQ

How long do Opae Ula shrimp live?

Opae ula (Halocaridina rubra) are famous for their incredible longevity, often living for 10 to 20 years in captivity. They are highly resilient, able to survive in the low-oxygen, fluctuating salinity conditions of their native Hawaiian habitats.

Can you keep Opae Ula in a sealed jar or ecosystem?

Yes, Opae ula are frequently sold in small, completely sealed glass orbs or jars marketed as self-sustaining ecosystems. Because they require very little food and produce minimal waste, they can survive for years on microscopic algae that grow inside the container.

What water salinity do Opae Ula shrimp need?

Opae ula are euryhaline, meaning they can tolerate a massive range of water salinity, from brackish to full marine water. In an aquarium, they thrive best in brackish water, usually maintained at a specific gravity around 1.010 to 1.015.

Where do Opae Ula shrimp naturally live?

They are endemic to Hawaii, where they exclusively inhabit anchialine pools—landlocked bodies of water with underground connections to the ocean. These unique pools are found along the lava beds of the Big Island and Maui.

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