Brackish aquarium fish

Brackish fish live where fresh and salt water meet, from mollies to figure-eight puffers and monos. Each profile lists the tank size and conditions a fish needs, so you can match a species to a brackish tank.

38 species

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  Banded Archerfish

  Toxotes jaculatrix

  11.8 in (30 cm)119 gal (450 L)77–86°F (25–30°C)

• 

  Black molly

  Poecilia sphenops

  4.7 in (12 cm)24 gal (90 L)70–82°F (21–28°C)

• 

  Bumblebee goby

  Brachygobius doriae

  1.6 in (4 cm)12 gal (45 L)72–82°F (22–28°C)

• 

  Cauca molly

  Poecilia caucana

  2.4 in (6 cm)16 gal (60 L)77–86°F (25–30°C)

• 

  Celebes rainbow

  Marosatherina ladigesi

  3.1 in (8 cm)25 gal (95 L)72–82°F (22–28°C)

• 

  Ceylon puffer

  Dichotomyctere fluviatilis

  6.7 in (17 cm)34 gal (130 L)75–82°F (24–28°C)

• 

  Colombian shark catfish

  Ariopsis seemanni

  13.8 in (35 cm)225 gal (850 L)72–79°F (22–26°C)

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  Dalmatian molly

  Poecilia latipinna

  4.7 in (12 cm)24 gal (90 L)70–79°F (21–26°C)

• 

  Drab Sole

  Achirus achirus

  14.6 in (37 cm)98 gal (370 L)77–86°F (25–30°C)

• 

  Endler's livebearer

  Poecilia wingei

  1.6 in (4 cm)5 gal (20 L)72–86°F (22–30°C)

• 

  Figure Eight Puffer

  Tetraodon biocellatus

  3.1 in (8 cm)20 gal (75 L)72–79°F (22–26°C)

• 

  Giant sailfin molly

  Poecilia velifera

  5.9 in (15 cm)30 gal (113 L)75–82°F (24–28°C)

• 

  Gill's molly

  Poecilia gillii

  3.9 in (10 cm)26 gal (100 L)72–86°F (22–30°C)

• 

  Green chromide

  Etroplus suratensis

  11.8 in (30 cm)145 gal (550 L)68–86°F (20–30°C)

• 

  Green spotted puffer

  Dichotomyctere nigroviridis

  5.9 in (15 cm)32 gal (120 L)75–82°F (24–28°C)

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  Guppy

  Poecilia reticulata

  2.4 in (6 cm)13 gal (50 L)64–82°F (18–28°C)

• 

  Knight goby

  Stigmatogobius sadanundio

  3.5 in (9 cm)21 gal (80 L)68–79°F (20–26°C)

• 

  Largescale four-eyed fish

  Anableps anableps

  11.8 in (30 cm)70 gal (265 L)77–88°F (25–31°C)

• 

  Least killifish

  Heterandria formosa

  1.4 in (3.5 cm)5 gal (20 L)68–79°F (20–26°C)

• 

  Liberty molly

  Poecilia salvatoris

  3.9 in (10 cm)24 gal (90 L)72–82°F (22–28°C)

• 

  Marbled goby

  Oxyeleotris marmorata

  23.6 in (60 cm)145 gal (550 L)72–82°F (22–28°C)

• 

  Mayan cichlid

  Mayaheros urophthalmus

  11.8 in (30 cm)90 gal (340 L)75–86°F (24–30°C)

• 

  Melanzona Guppy

  Poecilia parae

  2 in (5 cm)15 gal (55 L)75–82°F (24–28°C)

• 

  Orange chromide

  Etroplus maculatus

  3.9 in (10 cm)55 gal (210 L)68–82°F (20–28°C)

• 

  Pacific blue-eye (neon)

  Pseudomugil cyanodorsalis

  1.4 in (3.5 cm)12 gal (45 L)72–82°F (22–28°C)

• 

  Paradise Threadfin

  Polynemus paradiseus

  9.8 in (25 cm)75 gal (285 L)75–82°F (24–28°C)

• 

  Sailfin molly

  Poecilia latipinna

  4.7 in (12 cm)24 gal (90 L)70–79°F (21–26°C)

• 

  Scarlet livebearer

  Micropoecilia picta

  1.6 in (4 cm)16 gal (60 L)72–82°F (22–28°C)

• 

  Sebae mono

  Monodactylus sebae

  7.9 in (20 cm)119 gal (450 L)75–82°F (24–28°C)

• 

  Seven-spot archerfish

  Toxotes chatareus

  15.7 in (40 cm)106 gal (400 L)77–86°F (25–30°C)

• 

  Shortfin molly

  Poecilia mexicana

  4.3 in (11 cm)32 gal (120 L)72–82°F (22–28°C)

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  Siamese tiger perch

  Datnioides pulcher

  17.7 in (45 cm)185 gal (700 L)75–82°F (24–28°C)

• 

  Silver mono

  Monodactylus argenteus

  9.8 in (25 cm)106 gal (400 L)75–82°F (24–28°C)

• 

  Silver scat

  Selenotoca multifasciata

  11.8 in (30 cm)119 gal (450 L)72–82°F (22–28°C)

• 

  Silver tiger perch

  Datnioides polota

  11.8 in (30 cm)79 gal (300 L)75–82°F (24–28°C)

• 

  Spotted scat

  Scatophagus argus

  11.8 in (30 cm)119 gal (450 L)72–82°F (22–28°C)

• 

  Violet Goby

  Gobioides broussonnetii

  21.7 in (55 cm)119 gal (450 L)72–79°F (22–26°C)

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  Wrestling halfbeak

  Dermogenys pusilla

  2.8 in (7 cm)25 gal (95 L)75–82°F (24–28°C)