What Size Tank for 1 Goldfish? Premium AI Image A close up of a gold fish scales. Gold Fish Scale Crop Tank Top Goldfish Care: New Tank Setup Fancy Goldfish Tank. Four way stretch lycra spandex in a gorgeous sparkling gold fish scale fabric! It features a low scoop neckline in front and back, and fits like a glove. TOP LENGTH: Underarm to hemline measures 8" This item is made to order. Ships out within 5 days of purchase.