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 5 of 80 species

Banggai Cardinalfish

Banggai cardinalfish

Intermediate

Silver body with black vertical bars and star-like white spots. Unique mouthbrooding behavior. Ideal kept as pairs.

MouthbrooderPair keepingPeaceful

Cleaner Wrasse

Labroides dimidiatus

Intermediate

Cleaner fish that eats parasites from other fish. Sets up cleaning stations in tank — fun to watch fish queue up.

Cleaner fishParasite removalSymbiotic

Pajama Cardinalfish

Sphaeramia nematoptera

Beginner

Small marine fish with cute pajama-like polka dot pattern. Peaceful, hardy, beginner-friendly. Looks great in groups.

PeacefulBeginner-friendlyReef-safe

Peppermint Shrimp

Peppermint shrimp

Beginner

Beautiful marine shrimp with red and white stripes. Valued for eating Aiptasia (pest anemone) — a beneficial cleaner.

BeneficialAiptasia controlPeaceful

Springer's Damselfish

Chrysiptera springeri

Beginner

A small damselfish with beautiful deep blue-purple color. Peaceful and easy to keep like Green Chromis.

Springer'sBlue-purplePeaceful

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.