Species Catalogue
1,570 species — care guides, community photos, water parameters, and tank-mate compatibility.
Blind Cave Tetra
Astyanax mexicanus
Blue Acara
Andinoacara pulcher
Blue Assessor
Assessor macneilli
Blue Axelrodi Rasbora
Sundadanio axelrodi blue
Blue Badis
Badis badis
Blue Bolt Pinto Shrimp
Caridina logemanni
Blue Diamond Discus
Symphysodon sp.
Blue Gourami
Trichopodus trichopterus
Blue Gularis Killifish
Fundulopanchax sjoestedti
Blue King Kong Shrimp
Caridina logemanni
Blue Leg Poso Prawn
Macrobrachium latidactylus
Blue Medaka
Oryzias latipes
Blue Moon Crayfish
Cherax pulcher
Blue Panchax
Aplocheilus panchax
Blue Pearl Shrimp
Neocaridina zhangjiajiensis var. Blue Pearl
Blue Phantom Pleco
Hemiancistrus sp.
Blue Pincher Macro
Macrobrachium vollenhovenii
Blue Platy
Xiphophorus maculatus
Blue Rili Shrimp
Neocaridina davidi
Blue Star Endler
Poecilia wingei
Blue Tang
Paracanthurus hepatus
Blue Tiger Shrimp
Caridina cf. cantonensis 'Blue Tiger'
Blue Wag Platy
Xiphophorus maculatus
Blue-Green Algae (Freshwater)
Cyanobacteria spp.
A blue-green or red-brown slime that coats the substrate, plants, and glass with a slimy, foul-smelling mat. Technically a bacterium, not true algae. Caused by low nitrates, poor flow, and organic waste. Responds to a 3-day blackout combined with the antibiotic erythromycin or hydrogen peroxide treatment.
Blue-Green Algae (Saltwater)
Cyanobacteria spp.
Red, purple, or dark blue-green slime mats that smother the sandbed and rockwork with a slimy, oxygen-depleting film. Technically a bacterium. Caused by low nitrates, poor flow, and high dissolved organics. A 3-day blackout, hydrogen peroxide spot-treatment, and improved flow usually break the cycle.
Blue-throat Triggerfish
Xanthichthys auromarginatus
Blueberry Snail
Viviparus sp.
Bluefin Killifish
Lucania goodei
Bluefin Notho
Nothobranchius rachovii
Blushing Angelfish
Pterophyllum scalare
Blyxa Aubertii
Blyxa aubertii
Borellii Dwarf Cichlid
Apistogramma borellii
Borneo Sucker Loach
Gastromyzon punctulatus
Brazos Dwarf Crayfish
Cambarellus texanus
Brevis Shell Dweller
Neolamprologus brevis
Brichardi Cichlid
Neolamprologus brichardi