Abstract: The three-dimensional deformation of fish caudal fin during swimming was reported in several teleost bony fish species, e.g., bluegill sunfish (Lepomis macrochirus) and cichlid fish ...

Professor Vera Schluessel, from the University of Bonn, Germany, who led the study, tested whether eight zebra mbuna (Pseudotropheus zebra) and eight freshwater stingrays (Potamotrygon motoro) could ...

Recent studies have detected simple arithmetic abilities beyond mammal and bird brains, from salamanders to bees. A new study adds stingrays and cichlids to the small but growing list of animals that ...

Vera Schluessel and colleagues tested whether eight zebra mbuna (Pseudotropheus zebra) and eight freshwater stingrays (Potamotrygon motoro) could be trained to recognize the color blue as a symbol for ...

Stingrays and zebra mbuna fish can perform simple addition and subtraction involving numbers between 1 and 5. Several studies have shown that fish can tell the difference between higher and lower ...

Royalty-free licenses let you pay once to use copyrighted images and video clips in personal and commercial projects on an ongoing basis without requiring additional payments each time you use that ...

The two species ( Pseudotropheus emmiltos and Pseudotropheus fainzilberi ) are found in the north western part of Lake Malawi. Until now, the only known difference between them was the color of ...