Description
H. littorale is armor-plated and dorso-ventrally compressed. The fish will grow in length up to 24.0 centimetres (9.4 in) TL.
Males grow to a larger average and maximum size than females and, during the reproductive season, develop fat deposits in the pectoral fin and an elongated recurved pectoral spine that often assumes a reddish colour. Males with recurved pectoral spines are not found outside of the reproductive period.
Read more about this topic: Hoplosternum Littorale
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