Philippine Blue Angelfish

Philippine Blue Angelfish (Pterophyllum scalare) is the standard expression of the Philippine Blue gene — a silver to pale body suffused with iridescent blue-turquoise coloration that intensifies with age and becomes most vivid in mature adults. The blue shimmer shifts between turquoise and cobalt depending on the light angle, giving the fish a jewel-like quality. The Philippine Blue gene (pb/pb) is a recessive mutation that produces iridescent blue coloration. A fish needs two copies of the gene to display visible blue. The name 'Philippine Blue' is a historical misnomer — these are fully captive-bred fish with no connection to the Philippines; the gene emerged in a captive strain and the name simply stayed in the hobby. Juveniles often show little blue color, which develops fully as the fish matures.

Feeding & Care Tip: Sera Vipan Tropical Flakes and Hikari Micro Pellets make excellent daily staples — crush flakes for juveniles. Supplement 2–3× per week with Hikari Frozen or Freeze-Dried Bloodworms or Hikari Vibra Bites to bring out best color and condition. Hikari Frozen or Freeze-Dried Brine Shrimp make an excellent treat for adult fish. Feed 2–3 times daily in small amounts.

Angelfish are tall, laterally compressed fish that need aquarium height as much as length — a minimum of 18 inches of water depth is recommended, and 24 inches is ideal for adults. A planted aquarium with tall plants such as Amazon Swords, Vallisneria, or tall Cryptocorynes provides the cover and vertical structure this species naturally inhabits. Gentle filtration is important — strong currents stress angelfish. Keep with peaceful community fish of similar size; avoid known fin-nippers and do not keep with small fish such as neon tetras that may be eaten as adults.

Angelfish are devoted and fascinating parents. Pairs bond for life — presenting a flat, vertical surface such as a broad Amazon Sword leaf, a smooth slate tile, or a piece of PVC pipe triggers spawning. The female lays rows of adhesive eggs which both parents fan and guard obsessively, chasing away all other fish in the aquarium. Eggs hatch in 24–48 hours and the wriggling larvae are typically moved to a pit in the substrate by the parents. Fry become free-swimming after another 5–7 days and can be fed freshly hatched baby brine shrimp. Note that many generations of captive breeding have reduced parental instincts in some strains — if parents eat their eggs, the eggs can be removed and hatched artificially with an airstone.

Angelfish are tall, laterally compressed fish that need aquarium height as much as length — a minimum of 18 inches of water depth is recommended, and 24 inches is ideal for adults. A planted aquarium with tall plants such as Amazon Swords, Vallisneria, or tall Cryptocorynes provides the cover and vertical structure this species naturally inhabits. Gentle filtration is important — strong currents stress angelfish. Keep with peaceful community fish of similar size; avoid known fin-nippers and do not keep with small fish such as neon tetras that may be eaten as adults.

Care & Ideal Parameters