Small: 5 to 20 cm
Sardines, anchovies, most aquarium fish and many reef fish. 175 fish.
GroupSharkRayCarpCatfishSalmonidHerringCodTunaPerch-likeCichlidReef fishEelFlatfishLivebearerAncientOther
WaterRivers and lakesEstuaries and mangrovesCoasts and shelvesCoral reefsOpen oceanDeep seaPolar and cold seasCaves and springsBetween sea and river
WorldBluehead wrasse
A small Atlantic reef fish known for changing sex and colour.Other · Coral reefs
WorldLeaf scorpionfish
A small reef fish that mimics a drifting leaf to ambush prey.Other · Coral reefs · 1802
OceaniaMaroon clownfish
Large, aggressive anemonefish with a distinctive cheek spine.Other · Coral reefs
WorldMandarinfish
A small, brightly coloured Pacific fish kept in saltwater aquariums.Other · Coasts and shelves · 1927
WorldYellow prawn-goby
A small, colourful goby that shares burrows with shrimps.Other · Coasts and shelves
OceaniaPajama Cardinalfish
Small, spotted reef fish known for male mouthbrooding.Other · Coral reefs
South AsiaGreen spotted puffer
Small brackish water pufferfish with a tiny genomeOther · Rivers and lakes
WorldOrnate ghost pipefish
A camouflaged reef fish with variable colours and female brood pouches.Other · Coral reefs
🇺🇸 United States and 3 moreLined seahorse
A western Atlantic seahorse with white neck lines and male pregnancy.Other · Coasts and shelves · 1810
🇦🇺 Australia and 3 moreSpiny seahorse
A small, thorn-covered marine fish from the Indo-Pacific.Other · Coasts and shelves
Photo credits on this page
The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.
- Bluehead wrasse: (c) JamesLaFontaine, some rights reserved (CC BY), CC BY 4.0, source
- Leaf scorpionfish: Diego Delso, CC BY-SA 4.0, source
- Maroon clownfish: Nick Hobgood, CC BY-SA 3.0, source
- Mandarinfish: Luc Viatour, CC BY-SA 3.0, source
- Yellow prawn-goby: User:Haplochromis, CC BY-SA 3.0, source
- Pajama Cardinalfish: Totti, CC BY-SA 4.0, source
- Green spotted puffer: Starseed, CC BY-SA 3.0 de, source
- Ornate ghost pipefish: Nhobgood Nick Hobgood, CC BY-SA 3.0, source
- Lined seahorse: No machine-readable author provided. Stevenj assumed (based on copyrig, CC BY-SA 3.0, source
- Spiny seahorse: Nhobgood Nick Hobgood, CC BY-SA 3.0, source