Red Sea Urchin Heliocidaris Erythrogramma

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Red Sea Urchin – Heliocidaris erythrogramma

Overview:
The Red Sea Urchin is a vibrant echinoderm known for its brilliant crimson to deep burgundy spines. Its bold coloration makes it a standout addition to large marine aquariums while also serving as a useful grazer on unwanted algae.

Origin:
Native to temperate reef systems of the Western Pacific and Southern Australia, where it inhabits rocky seabeds and reef flats.

Feeding:

• Grazes on algae, seaweed, and detritus.

• Supplement diet with nori, algae wafers, and fresh macroalgae in captivity.

Tank Mates:

• Generally reef-safe, though it may occasionally scrape or topple corals and loose décor while grazing.

• Avoid housing with urchin predators such as puffers, triggers, or large Wrasses.

Aggression Level:
Peaceful. Non-aggressive toward fish and invertebrates.

Experience Level:
Intermediate to Advanced. Requires stable water quality, strong aquascaping, and regular algae availability.

Water Parameters:

• Temperature: 68–75°F (20–24°C) (slightly cooler than tropical urchins)

• pH: 8.1–8.4

• Salinity: 1.023–1.025

• Tank Size: 75+ gallons

Unique Features:

• Stunning blood-red coloration makes it highly decorative.

• Long-lived and resilient under proper care.

• Efficient grazer for algae management in larger aquariums.

✨ The Red Sea Urchin combines striking beauty with practical algae control, making it a superb choice for advanced aquarists with cooler reef systems.

Above images for illustration purposes only. Exact colours, patterns, and size may vary between individuals.

Please note: The livestock that is sold on our online site is not held in store at our Swell shop, or available for collection from the shop. Species sold at our Swell store will differ from ones available to order to your door.

All livestock deliveries are subject to our full Delivery Terms & Conditions, please read before ordering.