The high hat drum fish (Pareques acuminatus) is a striking nocturnal marine species known for its tall, sail-like dorsal fin, bold black-and-white vertical striping, and soft croaking sounds produced by its swim bladder. Native to the western Atlantic and Caribbean reefs, this shy fish does best in a peaceful, well-established saltwater aquarium of at least 55 gallons with plenty of caves and overhangs for daytime hiding. It prefers stable water parameters, low to moderate lighting, and calm tankmates that won’t compete aggressively for food. High hat drums are carnivorous and feed primarily at night on meaty foods such as mysis shrimp, finely chopped seafood, brine shrimp, and small crustaceans; multiple small feedings after lights dim are ideal to ensure proper nutrition. With attentive care, excellent water quality, and a diet rich in protein, this unique species can thrive and become a fascinating display fish for experienced marine aquarists.
Animal Type: Fish
Timor Wrasse
The Timor Wrasse (Halichoeres timorensis) is a colorful and active Indo-Pacific species valued for both its striking appearance and lively behavior in marine aquariums. Best suited for established systems of at least 50 gallons, this wrasse thrives in tanks with stable water parameters, ample swimming space, and a fine sand bed, which is essential as it naturally buries itself at night or when startled. Generally peaceful but not ideal for housing with very small invertebrates, the Timor Wrasse is considered reef-safe with caution and should be kept with a secure lid due to its tendency to jump. It does well in typical reef conditions with temperatures of 74–80°F (23–27°C), salinity of 1.023–1.025, and a pH of 8.1–8.4. In the wild, it feeds on small crustaceans and worms, and in captivity it readily accepts a varied, protein-rich diet including frozen mysis shrimp, enriched brine shrimp, chopped seafood, and high-quality marine pellets or flakes, offered once or twice daily to maintain health and vibrant coloration.
Sea Robin
Sea robins are distinctive, bottom-dwelling marine fish known for their broad, armored heads, wing-like pectoral fins, and unusual “walking” behavior. These fins are often brightly colored and can be spread wide, giving the sea robin an eye-catching appearance as it moves along sandy or muddy substrates. Native to coastal waters of the Atlantic, sea robins are hardy, curious fish that spend most of their time exploring the seafloor in search of food, using modified fin rays to feel and probe the sand.
Brown Heniochus Butterfly
The Brown Heniochus Butterflyfish (Heniochus varius) is an elegant, eye-catching marine fish known for its flowing dorsal streamer and rich brown, cream, and white coloration. Native to the Indo-Pacific, it inhabits coral reefs and outer reef slopes where it moves gracefully through open water. In aquariums, the Brown Heniochus is valued for its calm demeanor and striking appearance, making it a standout display fish in larger saltwater systems. While hardy and adaptable, it is best suited for fish-only or carefully planned reef aquariums due to its potential to nip at corals.
Pajama Cardinalfish
- The Pajama Cardinalfish (Sphaeramia nematoptera) is a peaceful, reef-safe 3″ nano–community favorite with a yellow face, polka-dot midsection, and red tail. A calm, hover-style swimmer that shelters under ledges, it really shines in small groups (3–6+) where its relaxed schooling behavior adds steady motion to the display.
Lamarck’s Angelfish
The Lamarck’s Angelfish (Genicanthus lamarck) is a graceful, reef-safe swallowtail angel prized for its bold black striping, silver-white body, and striking sexual dimorphism—males develop longer tail streamers and deeper markings, while females keep a refined, understated look. A mid-water cruiser by nature, it spends most of its time in open water above the rockwork, adding constant motion without harassing corals.
Black Pyramid Butterflyfish
The Black Pyramid Butterflyfish is a rare and dramatic color form of the Pyramid Butterflyfish (Hemitaurichthys zoster). While the standard pyramid butterfly is white with a bold black triangular wedge on the body, this dark morph displays a much heavier black or charcoal coloration, often covering most of the body with lighter white or silver accents toward the face and fins. The tall, triangular body shape gives the fish a sharp, geometric look that immediately stands out in large reef aquariums. Adults typically reach 6–7 inches, making them a medium-sized but visually dominant butterflyfish.
Allen’s Damselfish
Allen’s Damsel is a striking yet often underrated member of the Chrysiptera genus, known for its vibrant coloration and compact, athletic body shape. Adults typically display a rich electric blue to bluish-purple body accented by bright yellow or gold on the face, dorsal area, or tail region, depending on lighting and mood. Like many damsels, their coloration intensifies under good water quality and proper diet. They are relatively small, usually reaching about 2.5–3 inches, making them suitable for a wide range of marine aquariums. Allen’s Damsels are alert, fast swimmers and spend much of their time darting in and out of rockwork, defending a chosen territory.
Naked Sleeper Goby
- The Six Spot Sleeper Goby is a peaceful, sand-sifting goby valued for both its subtle beauty and its functional role in marine aquariums. Its calm demeanor and natural behavior make it a popular choice for reef keepers looking to maintain a clean, oxygenated sand bed. Six Spot Sleeper Gobies typically grow to 5–6 inches in length. They have an elongated, streamlined body with a pale white to light gray base color marked by six distinct dark spots along the flanks, which give the species its common name. Fine blue or yellow accents may be visible on the fins under strong lighting. Their large eyes and slightly upturned mouth are well adapted for spotting and sifting food from the sand.
Horned Blenny
The Horned Blenny is a small, character-rich saltwater fish best known for the distinctive fleshy “horns” or tentacles above its eyes. While not brightly colored, the Horned Blenny is highly engaging, offering constant personality and natural behavior that appeals to aquarists who appreciate subtle, interactive reef fish. Horned Blennies typically reach an adult size of 3–4 inches. Their coloration ranges from tan and brown to gray or olive, often mottled or banded to blend seamlessly with rockwork. The signature horn-like cirri above the eyes give the fish a curious, expressive look and may be more pronounced in males. Their elongated body and large eyes contribute to their alert, watchful appearance.
Shark Catfish
The Shark Catfish, more accurately known as the Columbian Shark Catfish, is a sleek, fast-swimming species admired for its shark-like silhouette and active schooling behavior. Its constant motion and silvery coloration make it an eye-catching addition to large, open aquariums designed for active fish. Columbian Shark Catfish have a streamlined, torpedo-shaped body with a metallic silver base color contrasted by a dark dorsal fin, forked tail, and black edging on the fins. They possess long barbels around the mouth, typical of catfish, which are used to sense food. Adults commonly reach 12–14 inches, with some individuals growing larger in spacious systems. Their size and speed mean they quickly outgrow smaller aquariums.
Koran Angelfish
The Koran Angelfish (Pomacanthus semicirculatus), also called the Semicircle Angel, is a dramatic showpiece known for its stunning transformation from juvenile to adult. Young fish display bold electric-blue rings; adults develop a rich green-gold body with blue edging and a distinctive “semicircle” pattern on the tail. Expect a confident, semi-aggressive personality best suited to large, mature systems with plenty of live rock for grazing and hideaways. This species reaches up to ~15″ and thrives long-term in 180–220+ gallon aquariums. Offer a varied omnivorous diet with angelfish formulas that include marine sponge, plus mysis, chopped seafood, nori, and high-quality pellets. Not reef safe—may nip LPS, zoanthids, and clam mantles—so it’s ideal for FOWLR or carefully curated displays.