Collection

Sea Urchins

Sea Urchins Collection

Premium Sea Urchins for Sale in Australia

Functional Reef Clean-Up Sea Urchins for Marine Aquariums

Explore our Sea Urchins Collection, featuring hardy and beneficial sea urchins for sale in Australia. Known for their algae-grazing behaviour and unique spined appearance, sea urchins play an important role in maintaining a clean, balanced reef aquarium. They are excellent natural cleaners that help control nuisance algae on rockwork and glass surfaces.

At Aquamarine Aquaristics, we supply healthy marine invertebrates for sale online in Australia, carefully selected for strong health, safe acclimation, and long-term reef compatibility.

Why Choose Sea Urchins?

Natural Algae Control for Reef Aquariums

Sea urchins are highly effective herbivores that help manage algae growth while contributing to a more natural reef ecosystem. Many species are reef-safe and active, constantly grazing surfaces and keeping rockwork clean. These reef clean-up invertebrates for sale are ideal for aquarists looking to reduce maintenance and improve tank stability.

Browse our sea urchin collection to find practical, beneficial additions that support a healthier and cleaner marine aquarium.

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Availability

Husbandry

Care guide

Care difficulty

BeginnerModerateExpert
Moderate

Temperament

SkittishPeacefulSemi-agg.Aggressive
Peaceful
Maximum size 20cm
0 cm 15 cm 30 cm

Minimum tank size

150 litres

Reef safe

Yes

Diet

Herbivore – Sea Urchins primarily feed on algae, including film algae, hair algae, and encrusting algae on rockwork and glass. In well-maintained tanks, supplemental feeding with dried seaweed (nori) or algae-based foods may be required.

Shipping Allowed

Biosecurity Permitted Species Are Listed In The Individual Species As Per States Regulations.

Avoid these pitfalls

Common Mistakes to Avoid

please follow the path for success!

  • Urchins require established algae growth. In new tanks, they can slowly starve even if water parameters are perfect.

  • Urchins can bulldoze loose coral frags, knock over rockwork, or move unsecured decorations while grazing.

  • In ultra-clean reef tanks, natural algae may not be enough, and urchins require added feeding to survive long term.

Help centre

Frequently asked questions

Find answers to common questions about our products and services

  • Yes, most Sea Urchins are reef safe, but they may move loose corals or disturb unstable aquascaping.

  • No, they do not eat healthy corals, but they may accidentally damage coral placement while grazing algae.

  • They are better suited to medium to large tanks due to their grazing range and constant movement.

  • This is often a sign of stress, poor water quality, or starvation and should be addressed immediately.

  • Yes.

  • Yes.

Reviewed on Google

What our customers say

Trusted by aquarium enthusiasts across Australia

4.9 127 reviews

Sarah M.

2 weeks ago

Absolutely fantastic service! The corals arrived healthy and vibrant. The team really knows their stuff when it comes to marine life.

James T.

1 month ago

Best place for reef supplies in Australia. Fast shipping and excellent customer support. Highly recommend!

Emma K.

3 weeks ago

Great quality products and the care guides are incredibly helpful. My reef tank has never looked better!

Michael R.

1 week ago

Professional packaging and healthy livestock every time. These guys are the real deal.

Lisa P.

2 months ago

Amazing selection and expert advice. They helped me choose the perfect cleanup crew for my tank.

David W.

3 weeks ago

Top-notch service from start to finish. The team's knowledge and passion for marine aquariums really shows.