Shortspine Urchin

Biosecurity Shipping Limitations apply

Shipping Allowed?

The Shortspine Urchin is an excellent marine algae grazer and a hardworking addition to established reef aquariums. Its compact body and relatively short spines allow it to navigate rockwork while continuously grazing on algae, biofilm and other growth.

These urchins are particularly useful for helping control green algae and nuisance growth on live rock and aquarium surfaces. They are generally peaceful and reef compatible, although their strong grazing and movement can occasionally disturb loose coral frags or unsecured decorations.

Provide plenty of natural algae and secure any lightweight rockwork or coral frags before introduction.

Quick Care Guide

• Scientific Name: Echinometra spp.
• Difficulty: Easy to moderate
• Lighting: Any standard reef lighting
• Flow: Moderate
• Temperature: 24–27°C
• Salinity: 1.024–1.026 SG
• Diet: Algae, biofilm and marine algae foods
• Minimum Aquarium: 75L+
• Placement: Live rock and hard surfaces
• Temperament: Peaceful
• Reef Compatibility: Generally reef safe
• Activity: Active grazer, particularly around rockwork

FAQ

What does a Shortspine Urchin eat?

It primarily grazes on algae and biofilm growing across live rock and other hard surfaces. Supplemental algae-based foods can be provided when natural algae is limited.

Are Shortspine Urchins reef safe?

Yes, they are generally considered reef compatible. However, their size and strength can cause them to accidentally move unsecured frags or decorations.

Will it help with algae?

Yes. Shortspine Urchins are effective grazers and can be particularly useful in aquariums experiencing persistent algae growth.

Can it knock over corals?

It can accidentally push loose coral frags or lightweight decorations while moving around the aquarium. Secure vulnerable pieces where necessary.

Common Mistakes

Adding one to an aquarium with no algae

Urchins need a reliable food source. Supplement their diet if the aquarium becomes too clean.

Leaving loose coral frags unsecured

Their strong movement can displace lightweight frags and decorations.

Handling them carelessly

Even short spines can be sharp. Handle carefully and avoid unnecessary contact.

Adding too many algae grazers

An oversized clean-up crew can quickly consume the available natural food.

Keeping salinity unstable

Urchins are sensitive to sudden changes in salinity, so careful acclimation and stable parameters are important.