Cut out the part of the fabric where the color changes,
Attach the dorsal and pectoral fins, sew the two pieces together, and stuff them with cotton.
You can make a sea bream mascot approximately 9.5cm wide.
The seam allowance is approximately 7mm.

In the photo above, the dorsal and pectoral fins were glued together and cut around them instead of being sewn together.
The material used is micro polyester.
The micro polyester peach skin surface feels very nice to the touch.
Next time, I'm thinking of making one out of double jersey or fleece.