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 8 of 80 species

Bicolor Dottyback

Pseudochromis paccagnellae

Beginner

Small saltwater fish divided into two colors: purple front half and vivid yellow rear half. Compact and hardy, easy to keep in small tanks and popular with beginners. Somewhat territorial.

BicolorPurpleYellow

Foxface Rabbitfish

Foxface rabbitfish

Intermediate

Yellow body with fox-like face. Excellent algae eater for tank cleaning. Venomous dorsal spines.

Algae eaterYellowVenomous spines

Lemonpeel Angelfish

Lemonpeel angelfish

Intermediate

Bright lemon-yellow body with blue eye ring. Popular small angelfish. Somewhat feisty but manageable size.

AngelfishYellowSmall

Longnose Butterflyfish

Forcipiger flavissimus

Intermediate

Distinctive butterflyfish with elongated snout and bright yellow body. Picks tiny prey from rock crevices. Among the hardiest butterflyfish with good feeding response.

IntermediateButterflyfishYellow

Watchman Goby

Valenciennea longipinnis

Beginner

Small goby with cute yellow body and blue dot pattern. Famous for symbiosis with pistol shrimp, where shrimp digs burrow and goby stands watch. Hardy and easy to keep.

GobyYellowPistol shrimp symbiosis

Yellow Coris Wrasse

Halichoeres chrysus

Beginner

A wrasse adding color to tank with vivid yellow body. Useful fish also active in pest control.

Yellow CorisYellowPest control

Yellow Tang

Yellow tang

Intermediate

Iconic marine fish with brilliant all-yellow body. Eats algae, serving as tank cleaner. Hardy and long-lived.

PopularYellowAlgae eater

Yellow Watchman Goby

Cryptocentrus cinctus

Beginner

A beautiful goby with vivid yellow body. Symbiotic relationship with pistol shrimp observable in tank.

Yellow WatchmanYellowSymbiosis

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.