What Do Triggerfish Eat?

• Crustaceans - shrimp, crabs, and lobsters are primary prey
• Mollusks - clams and other shelled animals
• Small fish - anything smaller than the triggerfish itself

• Zooplankton - tiny drifting crustaceans they catch with relative ease
• Algae - floating varieties in the water column (not the algae attached to rocks)

A key aspect of their feeding behavior is that triggerfish use hard-shelled prey to maintain their strong teeth. The shells of shrimp, crabs, and other invertebrates serve as natural chewing material that keeps their teeth trimmed and strengthened-a trait you'll want to replicate in the home aquarium.

One important note: triggerfish are not reef-safe. While they don't primarily target corals, they rummage aggressively through reef environments searching for the invertebrate animals that live within-often destroying corals in the process. If you keep invertebrates or maintain a reef tank, a triggerfish is not a compatible tankmate.

Feeding Triggerfish in Captivity

Protein-Based Foods

In an aquarium setting, most triggerfish thrive on a meat-based diet. You have several feeding options:

• Fresh seafood - Raw or blanched shrimp, squid, and other fresh marine proteins from a local seafood market (ensure it's aquarium-safe and pesticide-free)
• Frozen seafood - Thawed frozen shrimp and squid from aquarium suppliers (safer and more convenient than fresh)

• Marine fish pellets - High-quality sinking or slow-sinking pellets designed for carnivorous saltwater fish
• Live or frozen mysis shrimp - Mysis and brine shrimp are popular feeder options for marine fish and triggerfish readily consume them

Shells for Dental Health

Feeding whole shrimp with shells intact, or occasionally offering intact crabs and mollusks, gives triggerfish the hard material they need to grind and maintain their powerful teeth. Without this wear, their teeth can become overgrown and cause feeding difficulties.

Feeding Frequency and Amount

Feed your triggerfish once daily, providing an amount equivalent to their body size-roughly as much food as their eye. Remove any uneaten food after 5 minutes to prevent water quality issues. Overfeeding is a common mistake and can lead to poor tank conditions.

Diet by Species

While triggerfish generally share similar feeding habits, some species show variation in their preferences and behavior:

Clown Triggerfish

The Clown triggerfish is a striking, patterned beauty frequently seen in aquariums. It is a dedicated carnivore that actively hunts invertebrate prey. Feed it:

• Fresh or frozen shrimp and squid
• Marine pellets

• Whole shrimp with shells (for dental health)

This species benefits from harder-shelled prey to wear its teeth naturally.

Niger Triggerfish

The Niger triggerfish displays unusual coloration ranging from blue to purple and green. It is more adaptable than some cousins and will accept:

• Frozen seafood (shrimp, squid)
• Marine carnivore pellets
• Omnivore pellets from quality aquarium suppliers

Picasso Triggerfish

Named for its painted-like patterning, the Picasso triggerfish is an aggressive carnivore. It will pursue and consume:

• Any meat it encounters, including small fish
• Fresh or frozen shrimp and squid
• Flake foods and pellets designed for carnivorous fish

Picasso triggerfish are known for their aggression toward smaller fish, so tank selection and compatible companions are critical.

Queen Triggerfish

The Queen triggerfish, popular in public aquariums for its striking appearance, is one of the few omnivorous triggerfish species. It feeds on:

• Algae - both cultivated macroalgae and naturally growing marine plants
• Invertebrates - shrimp, crabs, and sea urchins (it has specialized feeding techniques for urchin spines)

The Queen triggerfish has a notably strong bite and temperament, so handle and house it with extra caution.

Hawaiian Black Triggerfish

The Hawaiian black triggerfish is the rare omnivore among triggerfish. Unlike most species that focus almost exclusively on meat, it regularly consumes:

• Plant matter and algae
• Meat and invertebrates
• A mixed diet depending on food availability

Titan Triggerfish

The largest triggerfish species, the Titan triggerfish has powerful jaws and sharp teeth rimmed in dark coloring. It is highly aggressive and destructive, regularly:

• Rummages and digs through sand and corals in search of prey
• Consumes hard invertebrates (crabs, sea urchins, mollusks)
• Eats corals and coral polyps while foraging
• May consume other fish in the tank

The Titan's feeding behavior is so destructive that it requires a very large, specialized setup and is generally recommended only for experienced aquarists. Other fish often follow behind it in the wild to scavenge from dislodged coral and prey.

Tank Setup Considerations for Feeding Triggerfish

Triggerfish require proper housing to accommodate both their size and their feeding behavior:

• Minimum tank size - 70 to 100 gallons for smaller species; larger species like Titan triggerfish need significantly more space
• Decorations - Minimal decor is sufficient; they mainly need hiding spots, but avoid reef structures if you want to protect invertebrates
• Substrate - Some species (notably Titan) dig and rummage extensively, so a sturdy sand bed is helpful
• Water quality - Frequent feeding requires robust filtration and regular water changes to prevent nutrient buildup

Common Feeding Mistakes

• Overfeeding - Leading cause of poor water quality and fish health issues
• Feeding incompatible tankmates - Triggerfish will consume smaller fish, shrimp, and most invertebrates
• Live corals and invertebrates in the same tank - Triggerfish destroy reef environments while foraging
• Neglecting hard-shelled prey - Skipping shells leads to overgrown teeth and feeding problems
• Inconsistent feeding schedule - Triggerfish are aggressive eaters; irregular feeding can cause stress and aggression

Final Takeaway

Understanding your specific triggerfish species' natural diet and replicating it in the aquarium is crucial to their health, tooth maintenance, and longevity. While most triggerfish are carnivores that thrive on frozen shrimp, squid, and quality marine pellets, species like the Queen and Hawaiian black triggerfish add algae to their diet. Regardless of species, provide hard-shelled prey regularly, maintain a consistent feeding schedule, and ensure your tank is large enough to support this active, occasionally aggressive fish.