Marine
fish
Care, feeding, compatibility, and behavior profiles to help you choose wisely and keep each species responsibly.
Start here
Before falling in love with a species, filter by space, diet, and behavior. The right fish is the one that fits the system you actually have.
Volume and swimming style
Not every aquarium volume provides the same territory or usable swimming length.
Real compatibility
Temperament, territory, body shape, and introduction order all matter.
Algae control
Useful herbivores, but never substitutes for balance and maintenance.
Specialized feeding
Extraordinary species that require a properly prepared aquarium before they arrive.
Explore by family and group
Surgeonfish
Active swimmers, herbivores, and prominent reef inhabitants.
Gobies and bottom-dwelling fish
Small specialists with remarkably nuanced behavior.
Blennies
Personality, grazing, and a close relationship with live rock.
Mandarinfish and dragonets
Exceptional beauty tied to microfauna and mature aquariums.
Butterflyfish
Elegant, specialized, and sensitive to diet and acclimatization.
Boxfish and unusual species
Unique body forms for well-prepared systems and keepers.
Which fish fits your aquarium?
Use volume, community type, and the role you need as a starting point. Then always confirm the species’ requirements in the full profile.
Explore all fish
Aquariums under 150 L
Start with small fish and check substrate, territory, and jumping tendency.
View a suitable option →
Community reef
Look for peaceful, reef-safe fish compatible with territories that are already occupied.
View a community option →
Algae grazers
Useful grazers that also need an adequate diet and regular monitoring of body condition.
Explore an algae-eating fish →Featured profiles
Four species representing very different aspects of marine fishkeeping: movement, grazing, microfauna, and behavior.
Achilles tang
Acanthurus achilles
Spectacular and demanding: flow, oxygenation, and space are non-negotiable.
Read full profile →
Yellow tang
Zebrasoma flavescens
A reef icon whose diet, territory, and activity require careful planning.
Read full profile →Mandarinfish
Synchiropus splendidus
Its beauty depends on something invisible: a mature and consistent food web.
Read full profile →Blue-spotted jawfish
Opistognathus rosenblatti
Temperature, substrate, and shelter determine its well-being far more than decoration.
Read full profile →Latest profiles added
Choose the fish after understanding the aquarium
Compare requirements, confirm compatibility, and calculate the true water volume before buying. A good decision begins long before the fish arrives home.
