List of smallest fish
List of smallest fish in the world

Image
Common Name
Species
Family
Standard length of smallest known mature individual
Maximum known standard length
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Paedocypris progenetica
Cyprinidae
7.9 mm (0.31 in), female
10.3 mm (0.41 in)
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Leptophilypnion fittkaui
Eleotridae
?
9.5 mm (0.37 in)
-
-
Leptophilypnion pusillus
Eleotridae
?
9.1 mm (0.36 in)
-
Dwarf pygmy goby
Pandaka pygmaea
Gobiidae
9 mm (0.35 in), male
11 mm (0.43 in)
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Midget dwarfgoby
Trimmatom nanus
Gobiidae
10 mm (0.39 in)
10 mm (0.39 in)
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-
Photocorynus spiniceps
Linophrynidae
6.2 mm (0.24 in), male
50.2 mm (1.98 in), female far larger than male and species not among smallest by maximum standard length
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Stout infantfish
Schindleria brevipinguis
Schindleriidae
6.5 mm (0.26 in), male
10 mm (0.39 in)

Question: What are the smallest fish species and what is the smallest recorded specimen for each?
Answer: Paedocypris progenetica is one of the smallest fish in the world, together with species such as Schindleria brevipinguis, with a maximum standard length of 10.3 mm (0.41 in) and the smallest known mature specimen, a female, measuring 7.9 mm (0.31 in).