Some universities and research institutions have subscriptions to stock photo libraries, which might include Imago or similar services. Check with your library or research support services to see if such resources are available.
: Watermarks are a declaration of ownership. They signal that the image is copyrighted property, belonging to the photographer and licensed through Imago. They act as a deterrent, preventing unauthorized copying and ensuring the creator can be fairly compensated for their work. Download Imago Images Without Watermark