Overview
- Native to the deep reefs of the Western Atlantic, particularly in the Caribbean.
- Recognized for its deep purple body with a bold black cap extending from the snout to the dorsal fin.
- Closely related to the Royal Gramma but tends to be more reclusive and territorial.
- Prefers to stay near rocky overhangs and caves for shelter and security.
- One of the most striking basslets, making it a popular choice for reef aquariums.
Feeding
- Carnivorous diet consisting mainly of zooplankton, small crustaceans, and copepods.
- Readily consumes frozen and live foods such as mysis shrimp and brine shrimp.
- Can be trained to accept high-quality pellets and flakes over time.
- Requires multiple small feedings throughout the day for optimal health.
- Occasionally scavenges among rockwork, feeding on microfauna and detritus.
Habitat
- Found at depths of 10-100 meters in rocky reef crevices and coral caves.
- Requires an aquarium with ample rock structures to provide hiding places.
- Prefers dimly lit environments but will explore more once acclimated.
- Best suited for reef tanks with stable water conditions and low aggression.
- A minimum tank size of 30 gallons (114 L) is recommended to support its territorial nature.
Fish Care
- Optimal water temperature: 74-80°F (23-27°C).
- Ideal pH range: 8.1–8.4, with a specific gravity of 1.025–1.026 (about 33–35 ppt).
- Resilient and hardy but requires high water quality to prevent stress.
- Can be territorial, especially toward similar-sized basslets and grammas.
- Regular water changes and a stress-free environment promote long-term health.
Compatibility
- Peaceful with most tank mates but may be aggressive toward its own species.
- Compatible with clownfish, gobies, wrasses, and other non-aggressive fish.
- Best kept singly unless in a very large aquarium with multiple territories.
- Reef-safe and does not harm corals, making it an excellent addition to reef tanks.
- Should not be housed with large predators that may view it as prey.
Aquarium Behavior
- Prefers to stay near rock formations, retreating into caves when startled.
- Can be shy at first but becomes more active once acclimated.
- May exhibit territorial displays toward fish encroaching on its space.
- Known for its unique hovering and darting swimming style.
- Thrives in an environment with plenty of shelter and minimal tank aggression.
Frequently Asked Questions
Has the Blackcap Basslet been bred in captivity?
Yes. It has been reared in captivity, though most fish in the trade are still wild-collected from the Caribbean.
How big does a Blackcap Basslet get?
Up to about 5 in (13 cm).
What size tank does a Blackcap Basslet need?
At least 30 gallons (114 L), with rock caves it can claim as home.
What does a Blackcap Basslet eat?
It is a carnivore. Feed meaty foods like mysis, chopped fish and crustacean flesh, and good frozen preparations.
Is the Blackcap Basslet reef safe?
Yes, it is an excellent reef fish. It only threatens the tiniest invertebrates, like copepods, isopods and amphipods.
Is the Blackcap Basslet aggressive?
It is peaceful with most fish, but it can get territorial once settled. Don't keep it with other basslets.
Does the Blackcap Basslet need special lighting?
It comes from deep water, so it does best with somewhat subdued lighting or shaded caves where it can retreat.
Why does my Blackcap Basslet swim upside down?
This is normal. It is often seen upside down on cliffs and under ledges, orienting itself to the rock rather than to the surface.
Is the Blackcap Basslet good for beginners?
Yes. It is hardy, easy to feed and peaceful, so it makes a good choice for a first reef tank.
Where does the Blackcap Basslet come from?
The Western Atlantic and Caribbean. It lives on steep cliffs and drop-offs beyond the outer reefs, most commonly deeper than 100 ft (30 m).