The Angelfish (Pterophyllum scalare) is a popular and elegant freshwater fish native to the Amazon River basin. Known for its triangular shape and long, flowing fins, angelfish thrive in aquariums of 20 gallons with warm temperatures (76–82°F) and slightly acidic to neutral water. These peaceful yet occasionally territorial fish do well in community tanks with similar-sized species, though they may nip at smaller fish or invertebrates. Angelfish are omnivorous, requiring a balanced diet of high-