Screenshot of the FishInspector graphical user interface showing an image with detected regions of interest (ROIs) for each feature. The interface allows users to adjust and correct detected ROIs manually. The image shows the final corrected ROIs and the detected features are the following: a, lower jaw tip (orange); b, eye contour (green); c, fish contour (red); d, pericard (blue); e, yolk sac (green); f, swim bladder (blue); g, otolith (green); h, notochord (green); i, pigmentation (yellow). Colours refer to the online version.