Clithon diadema (Black Gold Antler Snail)

15 March 2026

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The Black Gold Antler Snail is a striking, highly sought-after freshwater nerite variety. Famous for its prominent horn-like shell spikes and vibrant black and gold stripes, this tiny powerhouse is a relentless algae eater. It offers aquarists a beautiful, peaceful, and functional addition to any planted community tank.

Clithon diadema (Black Gold Antler Snail)

Overview

The Black Gold Antler Snail, scientifically known as Clithon diadema and often grouped under the broader category of Horned Nerite Snails, is a fantastic addition to the freshwater aquarium. Renowned for its unparalleled algae-eating abilities and unique, heavily armored appearance, this small snail is a favorite among aquascapers and casual hobbyists alike. Because they do not multiply in freshwater, they are the perfect cleanup crew for those who want to avoid snail population explosions.

Distribution and Habitat

Native to the Indo-Pacific region, including countries like Indonesia, Japan, and the Philippines, Clithon diadema naturally inhabits coastal streams, rivers, and estuaries. They are often found in areas where freshwater meets the ocean, clinging to rocks and driftwood in fast-moving, brackish, or fresh waters. Their natural environment is rich in algae and biofilm, which makes up the entirety of their diet.

Description of Black Gold Antler Snail

The Black Gold Antler Snail is relatively small, typically maxing out at about 0.5 to 0.8 inches in diameter. Its most defining feature is the array of sharp, horn-like appendages—or "antlers"—protruding from its shell, which serve as a natural defense mechanism against predators. The shell boasts a stunning pattern of thick, alternating jet-black and bright gold or yellow stripes.

Image of antlered snail black gold clithon diadema

The spikes can vary in length and number from snail to snail, making each individual unique. Care should be taken when handling them, as the horns can be surprisingly sharp!

Keeping and Caring for Black Gold Antler Snail

These snails are incredibly peaceful and can be kept with a wide variety of freshwater fish, shrimp, and other peaceful invertebrates. They are strictly herbivores and will not bother your live plants, choosing instead to meticulously clean the leaves of any algae. Because of their small size, they can easily navigate tight spaces in the aquascape without uprooting delicate foreground plants.

Tank size:

A minimum tank size of 5 gallons is recommended. While they are small, they require a tank with enough surface area to provide a constant supply of natural algae and biofilm.

Water Parameters:

Like all snails, the Black Gold Antler Snail requires specific water conditions to maintain a healthy shell and a long lifespan.

Temperature

They thrive in tropical temperatures ranging from 72°F to 82°F (22°C - 28°C).

pH

A neutral to alkaline pH of 7.0 to 8.2 is required. Acidic water (below 7.0) will slowly dissolve their shells, leading to pitting, weakness, and eventually death.

Hardness

Hard water is essential. High levels of Calcium and Magnesium (a GH of 8-18 dGH) are necessary for proper shell growth and maintenance.

Ammonia, Nitrite, Nitrate

Ammonia and Nitrite must always be at 0 ppm. Nitrates should be kept below 20 ppm. They are highly sensitive to copper, so avoid any copper-based medications or plant fertilizers.

Feeding the Black Gold Antler Snail

The primary diet of the Black Gold Antler Snail is algae. They are voracious eaters of soft film algae, diatoms, and green spot algae found on glass, rocks, and decorations.

If your aquarium is pristine and lacks natural algae, you must supplement their diet to prevent starvation. High-quality algae wafers, spirulina powder, and blanched vegetables (like zucchini, spinach, or cucumber) should be offered regularly. The image above perfectly illustrates a group of these snails enthusiastically grazing on an algae-covered stone.

Breeding Black Gold Antler Snail

One of the biggest appeals of the Black Gold Antler Snail is that they will not overrun your aquarium. While females will lay small, white, sesame-seed-like eggs on hard surfaces (often visible on rocks, driftwood, and even the shells of other snails), these eggs will not hatch in freshwater. The larvae require brackish or fully marine water to survive and develop. Therefore, breeding them in a standard home freshwater aquarium is virtually impossible.

Conclusion

The Black Gold Antler Snail (Clithon diadema) is a top-tier choice for any freshwater aquarist looking for an effective, plant-safe algae eater. With their striking black and gold stripes, fascinating horned shells, and inability to overpopulate a freshwater tank, they provide both aesthetic beauty and highly practical cleaning services to the aquarium.

Snail info

Temperature : 72 - 82°F (22 - 28°C)
pH: 7.0 - 8.2
Color Form: Black, Gold, Yellow

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