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 4 of 80 species

Chevron Tang

Ctenochaetus hawaiiensis

Intermediate

Juveniles are vivid orange with chevron patterns. Adults turn olive but serve as excellent detritivores, significantly contributing to tank cleanliness.

IntermediateDetritivoreCleaner

Mimic Tang

Acanthurus pyroferus

Beginner

Fascinating tang that mimics angelfish (Lemonpeel, Eibl's) as juveniles. Adults turn olive-brown. Hardy and practical algae grazer.

Beginner-friendlyMimicAlgae eater

Powder Blue Tang

Acanthurus leucosternon

Advanced

Beautiful pale blue body with black face and yellow dorsal. Indian Ocean tang. Prone to ich — water quality is critical.

BeautifulIch-proneAdvanced

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

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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.