As sallyanne mentioned, you can start from new and maybe you can use some of these : https://www.alamy.com/storm-water-inlet-...82978.html.
Text on circle, see this post : https://www.gimp-forum.net/Thread-Text-a...=text+path
A quick example: make a selection from the ellipse and fill it with blue on a new layer. Set this layer off.Try to select the fish with the 'Fuzzy Select Tool', copy the selection to a new layer and fill the selection with white on a new layer. Set the layer mode for this layer to 'Soft Light' and make the last 2 layers a 'new layer visible'. Create a curved path on the text 'Protect...' and type the text on a new text layer and use 'text along path' to curve the text (see link)
https://tradexcelgraphics.com/how-to-cur...t-in-gimp/
Text on circle, see this post : https://www.gimp-forum.net/Thread-Text-a...=text+path
A quick example: make a selection from the ellipse and fill it with blue on a new layer. Set this layer off.Try to select the fish with the 'Fuzzy Select Tool', copy the selection to a new layer and fill the selection with white on a new layer. Set the layer mode for this layer to 'Soft Light' and make the last 2 layers a 'new layer visible'. Create a curved path on the text 'Protect...' and type the text on a new text layer and use 'text along path' to curve the text (see link)
https://tradexcelgraphics.com/how-to-cur...t-in-gimp/