Swalesi Basslet Fish

Introduction to Saltwater Basslets

Basslets are small, colorful, and hardy reef-safe fish known for their bold personalities and territorial nature. Native to the Caribbean and Indo-Pacific reefs, these fish prefer rocky caves and ledges, where they can dart in and out for cover. While they are generally peaceful toward most tankmates, basslets can be aggressive toward their own kind or similar-looking fish, making careful stocking important. Thanks to their compact size, ease of care, and vibrant coloration, basslets are excellent choices for nano and mid-sized reef tanks.

Care Requirements

Care Level: Easy to Moderate Minimum Tank Size: 20 – 50+ gallons Smaller species (e.g., Royal Gramma, Chalk Bass) – 20-30 gallons Larger or shyer species (e.g., Black Cap Basslet, Swissguard Basslet) – 40-50+ gallons Aquarium Setup: Requires plenty of rockwork and caves to establish a territory and reduce stress.

Diet & Nutrition

Diet: Carnivorous – Thrives on a variety of meaty foods

Recommended Foods:

Mysis shrimp, brine shrimp, and plankton High-quality marine pellets and flakes Small chopped seafood (for larger species) Basslets are opportunistic feeders and will accept both frozen and prepared foods, making them easy to feed.

Lifespan & Growth Rate

Lifespan: 5-8+ years Growth Rate: Slow to Moderate – Most species stay under 4 inches With proper care, basslets can live well over five years in a stable environment.

Temperament & Compatibility

Temperament: Semi-Aggressive – Territorial toward similar species but peaceful with most reef fish Reef Safe? Yes – Does not harm corals or most invertebrates Basslets do best in peaceful community tanks but may become aggressive toward other basslets or similar-looking fish. To minimize aggression: Keep only one basslet per tank, unless in a large system with plenty of hiding spots. Introduce them after more timid tankmates, as they can be territorial once established. Avoid keeping them with highly aggressive fish like large wrasses or dottybacks.

Common Challenges & Considerations

Territorial Behavior: Can be aggressive toward fish of similar size and shape. Jumping Risk: Basslets may jump when startled, so a secure lid is recommended. Shyness in New Environments: Some species, like the Swissguard Basslet, can be more reclusive at first but will become bolder over time. Water Conditions Temperature: 74-80°F dKH (Alkalinity): 8-12 pH: 8.1-8.4 Specific Gravity: 1.020-1.025 Basslets are hardy and adaptable but require stable water parameters to remain healthy.

Color Varieties & Popular Species

Basslets are prized for their bright colors and striking patterns, making them standout additions to reef aquariums. Popular species include: Royal Gramma (Gramma loreto) – Vibrant purple-to-yellow gradient, one of the most popular reef fish Black Cap Basslet (Gramma melacara) – Deep purple body with a striking black head cap Swissguard Basslet (Liopropoma rubre) – Sleek orange body with thin dark stripes, more reclusive but highly sought-after Chalk Bass (Serranus tortugarum) – Hardy, bluish-purple with orange markings, one of the most peaceful basslets