Double Dark Black Angelfish: The Ultimate Guide

By AFT Editorial • Last Update: September 28, 2025

Often called the "true black angelfish" of the aquarium hobby, the Double Dark Black Angelfish is revered for its stunning, jet-black velvety appearance. As a selectively bred variety of Pterophyllum scalare, this fish achieves its deep, uniform coloration from a double dose of the "Dark" gene.

A stunning Double Dark Black Angelfish with a deep, velvety black coloration.

This definitive guide offers a complete road map to caring for the stunning Double Dark Black Angelfish. We go beyond basic care to delve deep into the simple genetics that give this fish its signature look, demystifying the crucial difference between the Double Dark (D/D) and its close relative, the Black Lace Angelfish (D/+). Inside, you'll find expert recommendations on the ideal tank setup to accentuate its velvety black color, a detailed breakdown of water parameters and diet, and a compatibility guide for choosing peaceful tank mates. For the aspiring breeder, we also explore the fascinating and predictable genetic outcomes of pairing this true-breeding variety.

Quick Facts

Double Dark Black Angelfish Fact Sheet
Topic	Details
Scientific Name	Pterophyllum scalare (Var. Double Dark Black)
Common Names	Double Dark Black, Black Velvet Angelfish, Black Angelfish
Genotype	Double Dark Gene (D/D)
Care Level	Beginner to Intermediate
Temperament	Semi-aggressive
Adult Size	Up to 6 inches (15 cm) long, 8+ inches (20+ cm) tall
Minimum Tank Size	30 gallons (114 liters); 55+ gallons for a community
Tank Shape	A tall aquarium is mandatory
Water Parameters	Temp: 76-82°F (24-28°C); pH: 6.0-7.5; Hardness: 3-10 dGH
Diet	Omnivore; varied diet of high-quality prepared and frozen foods
Lifespan	10-15 years with proper care

What Is a Double Dark Black Angelfish?

The Double Dark Black Angelfish gets its stunning, solid coloration from inheriting two copies of the “Dark” gene, giving it a D/D genotype. Unlike its single-gene counterpart, the Black Lace Angelfish, this double dose completely masks the underlying wild patterns and even the intricate structures within the fins. This results in the deep, uniform, and opaque black color that has earned it the popular name “Black Velvet.”

Appearance & Identification

The appearance of a Double Dark Black Angelfish is defined by its intensity and uniformity.

Color: A deep, rich, and solid black. A healthy, high-quality specimen will show minimal fading or blemishes.
Texture: The scales often lack the shine of other varieties, giving the fish a matte or “velvety” finish.
Fins: The fins are solid black, without the visible patterns or “lace” seen in the Black Lace variety. This lack of a fin pattern is the most reliable way to identify a true Double Dark Black.

Temperament & Behavior

The behavior of the Double Dark Black is identical to all other common angelfish varieties. They are semi-aggressive cichlids that establish a pecking order. While generally peaceful in a suitable community tank, they can become territorial as they mature and pair off for breeding.

Tank Requirements & Habitat

Care for this variety is the same as for other P. scalare.

Tank Size: A tall tank is essential. A 30-gallon tall tank is the minimum for a pair, with a 55-gallon or larger being ideal for a small group.
Aquascape: To accentuate their dramatic coloration, use a light-colored substrate like white sand and a backdrop of vibrant green plants such as Java Fern and Anubias.
Filtration: A good filter is crucial for water quality. We recommend a reliable canister filter like the Fluval 307 for tanks 30-70 gallons, as it provides excellent biological filtration with a manageable flow rate.

Water Parameters

Temperature: 76-82°F (24-28°C)
pH Level: 6.0 to 7.5
Water Hardness: 3 to 10 dGH
Maintenance: Pristine water is key. Perform weekly water changes of 25-30% to keep nitrates low and the fish healthy.

Diet and Feeding

A varied, high-protein diet is best.

Staple Diet: A high-quality cichlid pellet or flake should be the primary food source. Brands like Northfin Cichlid Formula or Omega One are excellent choices.
Supplements: Offer frozen foods like bloodworms, brine shrimp, and mysis shrimp several times a week to provide variety and enrichment.

Breeding Double Dark Black Angelfish

Breeding this variety is fascinating because its genetic purity leads to very predictable outcomes.

Breeding Two Double Dark Blacks (D/D x D/D): This pairing will “breed true.” 100% of the offspring will be Double Dark Black Angelfish (D/D).
Breeding a Double Dark Black (D/D) with a Silver Angelfish (+/+): This cross will produce a different variety entirely. 100% of the offspring will be Black Lace Angelfish (D/+).

Understanding these outcomes is key for any hobbyist looking to breed for specific traits and completes the genetic puzzle between the three varieties.

For a wider overview of care basics, see our Freshwater Angelfish pillar.

Frequently Asked Questions

What is the difference between a Black Lace and a Double Dark Black Angelfish?

A Double Dark Black has two dark genes (D/D), making it solid, opaque black. A Black Lace has only one dark gene (D/+), resulting in a slightly less intense color and visible 'lace' patterns in its fins.

Do Double Dark Black Angelfish breed true?

Yes. When you breed two Double Dark Black (D/D) parents, 100% of the fry will also be Double Dark Black.

Why does my black angelfish look grey or washed out?

This can be caused by stress, poor water quality, or illness. However, it might also mean your fish is a Black Lace Angelfish, which is naturally less intensely black than a Double Dark.

Are Double Dark Black Angelfish rare?

They are generally less common in chain pet stores than standard varieties but are readily available from dedicated breeders and specialty local fish stores.

Do they require any special care compared to other angelfish?

No, their care requirements are identical to other varieties of Pterophyllum scalare. The primary needs are a tall tank, clean water, and a quality diet.