In fishery terms decurved means outer border curved inward or concave compared to straight or rounded or curved outwardly. Straight meaning no curvature.
Notice the curvature shape of the anal fins of the GSH in the link. The lateral line of GSH is said to be decurved for GSH as also seen in the link.
https://www.floridamuseum.ufl.edu/discover-fish/florida-fishes-gallery/golden-shiner/

Last edited by Bill Cody; 07/28/23 08:11 PM.

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