Big Eye Squirrelfish

Introduction to Saltwater Squirrelfish

Squirrelfish are bold, nocturnal fish recognized for their large eyes, bright red hues, and sharp spines. Found in deep reef environments, these fish are highly active at night, using their keen eyesight to hunt for crustaceans and small prey. While squirrelfish are hardy and adaptable, they can be territorial and aggressive toward smaller fish, making them better suited for fish-only or predator tanks rather than reef aquariums.

Care Requirements

Care Level: Easy to Moderate – Hardy but requires adequate space Minimum Tank Size: 75+ gallons Aquarium Setup: Prefers dim lighting or shaded rock formations Requires rock caves and overhangs for daytime shelter Thrives in low to moderate water flow Squirrelfish are social and often do best in groups, but they can become territorial if kept in small tanks. Diet & Feeding Squirrelfish are carnivorous hunters, feeding on small fish, shrimp, and other meaty foods. Diet Type: Carnivorous – Prefers live and frozen foods

Recommended Foods:

Mysis shrimp, krill, and brine shrimp Chopped squid, scallops, and fresh seafood High-quality frozen marine foods and carnivore pellets They are primarily nocturnal feeders, so evening feedings help encourage natural hunting behaviors.

Lifespan & Growth Rate

Lifespan: 5-10 years Size Potential: Typically grows 6-12 inches, depending on the species Squirrelfish grow steadily and require ample space and tank planning to accommodate their adult size.

Temperament & Compatibility

Temperament: Semi-Aggressive – Can be territorial but generally coexist with similar-sized tankmates Reef Safe? No – Will eat small fish, shrimp, and invertebrates Use Caution With: Small fish, shrimp, and crabs – Will be eaten Other territorial species that may compete for shelter

Common Challenges & Considerations

Nocturnal Behavior: More active at night—providing low-light areas helps them feel secure. Predatory Nature: Will consume small invertebrates and fish, making them unsuitable for reef tanks. Sharp Spines: Handle with care—squirrelfish have sharp dorsal spines that can cause irritation. Ensuring a well-structured aquarium with proper tankmates is key to successfully keeping squirrelfish.

Color Varieties & Popular Species

Squirrelfish are available in a variety of bold red hues and patterns, adding vibrancy to fish-only marine setups. Popular Squirrelfish Species: Longspine Squirrelfish (Holocentrus rufus) – Bright red with a sleek body and long dorsal spines Bigeye Squirrelfish (Myripristis jacobus) – Deep red with oversized eyes adapted for low-light hunting Striped Squirrelfish (Sargocentron xantherythrum) – Red body with white horizontal stripes and a stocky build Crown Squirrelfish (Sargocentron diadema) – Distinctive white and red pattern with an arched dorsal fin