Is keeping marine fish difficult?

While more water quality management is needed compared to freshwater, starting with hardy species like clownfish or blue-green chromis makes it very manageable for beginners. Stable salinity and temperature are key.

How much do marine fish cost?

Clownfish range from 2,000-5,000 yen, blue tangs from 5,000-15,000 yen, and popular angelfish from 5,000-50,000+ yen depending on species and size.

How long do marine fish live?

Small fish live 5-10 years, while medium species like angelfish can live 10-20+ years. Proper environment and nutrition enable long-term care.

What should I check when buying marine fish?

Check for white spots or injuries on the body, intact fins, and that the fish is eating well. Choosing quarantined specimens gives extra peace of mind.

What equipment is needed for marine fish?

Basic equipment includes a tank, salt mix, refractometer, canister filter or overflow system, heater, and protein skimmer. Starting with a 60cm+ tank is recommended.

Marine Fish Encyclopedia — 80 Species Directory

Encyclopedia of popular marine fish species with care guides, traits, and water parameters.

Featured Marine Fish

Harlequin Tuskfish

All Beginner Intermediate Advanced

Small Hardy Beautiful Yellow Algae eater Reef-safe Reef safe Schooling Peaceful Purple Cleaner Large Tang Marine fish Mouthbrooder

Showing 10 of 80 species

Blue Devil Damselfish

Chrysiptera taupou

Beginner

Small marine fish in vivid cobalt blue. Extremely hardy, often used as pilot fish. Aggressive temperament.

Beginner-friendlyHardyAggressive

Coral Beauty Angelfish

Twospined angelfish

Beginner

Beautiful small angelfish with purple and orange gradient. Hardy and easy to keep — popular entry-level angelfish.

Beginner-friendlyAngelfishHardy

Damselfish

Beginner

Hardy small fish with vivid blue or neon colors. Used as pilot fish for tank cycling.

DamselfishHardyPilot fish

Flame Hawkfish

Neocirrhites armatus

Beginner

A vivid red hawkfish with habit of perching on corals. Hardy and easy to keep.

HawkfishRedPerching

Orchid Dottyback

Pseudochromis fridmani

Beginner

A small marine fish with beautiful orchid-like vivid purple. Hardy and adds color to tanks.

Orchid DottybackPurpleHardy

Royal Dottyback

Pictichromis paccagnellae

Beginner

Striking bicolor — vivid purple front and bright yellow rear. Hardy and feeds well, but feisty temperament can be aggressive toward similar-sized fish.

Beginner-friendlyBicolorSmall

Scopas Tang

Zebrasoma scopas

Beginner

Brown-bodied tang, not flashy but an excellent algae cleaner. Hardy and easy to keep. More affordable than Yellow Tang. Actively grazes on algae.

Beginner-friendlyAlgae eaterHardy

Tomato Clownfish

Tomato clownfish

Beginner

A large clownfish with distinctive deep red body. Hardy and easy but somewhat aggressive.

TomatoRedLarge

Yellowtail Blue Damselfish

Chrysiptera parasema

Beginner

Damselfish with vivid blue body and beautiful yellow tail fin. Hardy, eats prepared food well, and is one of the best species for saltwater fish beginners. Can be kept in small tanks.

DamselfishBlueYellow tail

Yellowtail Damselfish

Microspathodon chrysurus

Beginner

A damselfish with vivid blue body and yellow tail. Hardy but becomes aggressive when grown.

YellowtailBlue×YellowHardy

Browse Marine Fish Listings

Marine Fish FAQ

Is keeping marine fish difficult?: While more water quality management is needed compared to freshwater, starting with hardy species like clownfish or blue-green chromis makes it very manageable for beginners. Stable salinity and temperature are key.
How much do marine fish cost?: Clownfish range from 2,000-5,000 yen, blue tangs from 5,000-15,000 yen, and popular angelfish from 5,000-50,000+ yen depending on species and size.
How long do marine fish live?: Small fish live 5-10 years, while medium species like angelfish can live 10-20+ years. Proper environment and nutrition enable long-term care.
What should I check when buying marine fish?: Check for white spots or injuries on the body, intact fins, and that the fish is eating well. Choosing quarantined specimens gives extra peace of mind.
What equipment is needed for marine fish?: Basic equipment includes a tank, salt mix, refractometer, canister filter or overflow system, heater, and protein skimmer. Starting with a 60cm+ tank is recommended.