Freshwater · Intermediate
Goldfish
Carassius auratus
Goldfish are coldwater carp, not bowl ornaments. Fancy strains need tens of gallons and strong filtration; single-tail commons belong in very large tanks or ponds.
Min. tank: 30 gal
Care notes →Fish directory
Profiles with adult tank sizes, temperament, and FAQs. Filter by water type or difficulty.
Showing 5 species · Intermediate
Freshwater · Intermediate
Angelfish
Pterophyllum scalare
Freshwater angelfish are tall Amazonian cichlids. They need height more than a long, low tank. About 30 gallons and 18+ inches of height for a pair is an indoor start.
Min. tank: 30 gal
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Saltwater · Intermediate
Ocellaris clownfish
Amphiprion ocellaris
Ocellaris clownfish are among the more forgiving marine fish, but they still need a cycled saltwater tank, stable salinity, and marine-level testing. A 20-gallon tank can house a pair; 30 gallons is more comfortable.
Min. tank: 20 gal
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Saltwater · Intermediate
Yellow tang
Zebrasoma flavescens
Yellow tangs are active Hawaiian surgeonfish that need swimming room, not a nano reef. A home-aquarium minimum is about 125 gallons with length to patrol and rock to graze.
Min. tank: 125 gal
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Saltwater · Intermediate
Firefish goby
Nemateleotris magnifica
Firefish gobies are elegant, hovering dartfish for a covered saltwater tank. A 20-gallon reef can work for one. The lid is not optional. They jump.
Min. tank: 20 gal
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