Short-Spine Urchin

The Short-Spine Urchin (Echinometra spec) is a fascinating marine invertebrate found primarily in the shallow waters of the Indo-Pacific region, including the reefs around Bali, Indonesia. These urchins are characterized by their short, stout spines that can vary in color, often showcasing hues of green, purple, and brown, which help them blend into their rocky habitats. Their rounded bodies are covered in a hard shell known as a test, which provides protection against predators.

In terms of behavior, Short-Spine Urchins are primarily nocturnal, emerging at night to forage for food. They are known to be herbivorous grazers, feeding on algae and detritus found on the ocean floor. Their feeding habits play a crucial role in maintaining the health of coral reefs by controlling algal growth, which can otherwise smother coral and hinder its growth. During the day, they often hide under rocks or within crevices to avoid predation.

The habitat of the Short-Spine Urchin includes coral reefs, rocky substrates, and shallow lagoons, where they can find ample food and shelter. They prefer areas with good water movement, which helps to bring in nutrients and disperse waste. This species is well adapted to thrive in fluctuating environmental conditions, making it an excellent choice for aquarists looking to introduce a hardy invertebrate into their marine setups.

When caring for Short-Spine Urchins, it is essential to maintain stable water parameters to ensure their health and longevity. Ideal temperature ranges from 24 to 28 degrees Celsius, with a pH between 8.1 and 8.4. Although they are tolerant of various salinity levels, maintaining a salinity of 30-35 ppt is recommended for optimal health. The minimum tank size for keeping these urchins is 100 liters, providing ample space for grazing and hiding.

Feeding Short-Spine Urchins is straightforward, as they thrive on a diet of algae, which can be supplemented with algae wafers or blanched vegetables. Compatibility with other marine species is generally good, though caution should be exercised with more aggressive fish that may harass them. Acclimation should be done slowly over several hours to minimize stress, and a quarantine period of 2-4 weeks is advised to monitor for any potential diseases before introducing them to the main tank.

Short-Spine Urchins are suitable for shipping due to their hardy nature. They should be packed with care to avoid damage, ideally in a breathable, insulated container with sufficient water to maintain hydration. A temperature range of 20 to 24 degrees Celsius is optimal during transit. These urchins are not listed under CITES, facilitating easier export without special permits.