harlequin fish Directory References Images Discover 7 of History's Most Notorious Serial Killers Inventors and Inventions of the Industrial Revolution The 6 Deadliest Earthquakes Since 1950 9 Things You Might Not Know About Adolf Hitler Cruel and Unusual Punishments: 15 Types of Torture Why Are Flamingos Pink? Periods of American Literature Contents harlequin fish tropical fish Ask the Chatbot a Question Ask the Chatbot a Question Also known as: Rasbora heteromorpha Learn about this topic in these articles:description In rasbora…the most popular being the harlequin fish, or rasbora (R. heteromorpha), a reddish fish 4–5 cm (1.5–2 inches) long with a wedge-shaped black spot on each side.Read More