Fighting Conch (Strombus alatus)

The Fighting Conch is one of the most underrated and hardest-working members of any reef cleanup crew, and a genuine standout for hobbyists running a sandy substrate system. Native to the shallow waters of the western Atlantic Ocean, particularly around Florida and the Gulf of Mexico, S. alatus inhabits seagrass beds, shallow reefs, sand, and rubble, spending most of its time burrowing through substrate in search of algae and detritus. Its beautiful shell, which spirals to a series of points and displays shades of orange, brown, cream, and grey, makes it one of the more visually appealing cleanup crew animals available, and its constant activity across the sandbed makes it one of the most useful. Despite the intimidating common name, this is a thoroughly peaceful animal; the term "fighting" refers to the competitive behaviour of males during mating season, where they use their shells to gently push rivals away rather than engaging in any true aggression. Everything else in the tank is safe.

Why we love them

• Outstanding sand bed worker that constantly burrows, sifts, and aerates substrate, preventing compaction, dead spots, and the anaerobic conditions that lead to hydrogen sulphide buildup
• Consumes algae, detritus, and organic matter that accumulates within and beneath the substrate, tackling the layer of waste that most cleanup crew animals cannot reach
• Strikingly beautiful shell with well-developed, visible eyes that scan actively as the animal forages; genuinely interesting to watch up close
• Fully reef safe and peaceful toward all fish, corals, and invertebrates outside of male-on-male territorial behaviour
• Hardy and long-lived with proper care; a well-fed Fighting Conch in a stable system is one of the more durable cleanup crew animals available

Suggested parameters

• Temperature: 24 to 26°C (75 to 79°F)
• Salinity: 1.025 to 1.026 SG
• pH: 8.1 to 8.4
• Alkalinity: 8 to 10 dKH
• Calcium: 400 to 450 ppm; important for healthy shell integrity and growth
• Magnesium: 1250 to 1400 ppm
• Nitrate: Under 20 ppm; sensitive to elevated nitrate levels over time
• Phosphate: 0.03 to 0.12 ppm
• Copper-based medications are immediately fatal to all mollusks and invertebrates and must never be used

Care and temperament

• Difficulty: Easy
• Temperament: Peaceful toward all tankmates; males can be territorial toward other males of the same species, particularly in smaller systems where territory cannot be established; this manifests as shell-pushing behaviour rather than harmful aggression
• Reef safe: Yes, fully compatible with corals and ornamental invertebrates
• Minimum tank size: 100 litres (25 gallons); larger systems can comfortably house multiple individuals
• A deep, open sandy substrate is essential; this is a burrowing species that needs room to move through and beneath the sandbed freely, and a bare-bottom or shallow-substrate system is not suitable
• Hardy but requires open, accessible sand beds with sufficient depth to search for food; it will struggle in tightly packed or coarse substrate that it cannot penetrate
• If flipped upside down, it will use its muscular foot and operculum to right itself with a characteristic energetic rocking motion that gives some the impression it is "fighting"; this is completely normal behaviour and not a sign of distress

Diet

The Fighting Conch is an omnivorous scavenger with a strong appetite relative to its size.

• Grazes naturally on algae, detritus, and organic matter within and beneath the sandbed throughout the day
• Has a voracious appetite; supplemental feeding is required in smaller systems and recommended in even well-established larger aquariums to keep it thriving long-term
• Nori and dried seaweed sheets placed near or on the substrate
• Algae wafers and sinking herbivore pellets placed on the sandbed are readily accepted
• Finely chopped meaty marine foods including shrimp, clam, and fish flesh can supplement the diet
• Feed every two to three days in addition to what it finds naturally; a well-fed Fighting Conch is a more active and longer-lived one

Compatibility and tankmates

• Excellent with all reef fish, corals, hermit crabs, shrimp, and most ornamental invertebrates
• Multiple specimens can be kept together in larger systems; in smaller tanks, keep one or introduce only females to avoid male territorial behaviour
• Avoid triggerfish, puffers, large hawkfish, and aggressive wrasse species that will target mollusks
• Large hermit crabs that may attempt to steal its shell should be avoided or monitored
• Compatible with other cleanup crew snails including Trochus and Cerith species, which cover different zones and feeding niches

Health and acclimation notes

The Fighting Conch is sensitive to rapid changes in water chemistry and salinity during acclimation. Drip acclimation is recommended for all mollusks and invertebrates before introduction to the display. Maintain stable calcium and alkalinity levels to support healthy, intact shell growth over the long term. Copper-based medications must never be used in any system housing this or any other invertebrate.

What you are buying

• You will receive: 1 Fighting Conch (Strombus alatus)
• Shell colour and patterning vary between individuals, ranging from yellow-brown and cream to grey with orange highlights; shell shape develops distinctive spikes and points as the animal matures
• Adult size is approximately 7 to 10 cm (3 to 4 inches)

Drip acclimation is recommended. A deep, open sandy substrate must be in place before introduction. Copper-based medications must never be used in any system housing this animal.