Here they are! I've tried to make the colour and texture of each fish similar, but very slightly different. Fish number one has a lot of red and black in its colour scheme, while the little eel-y fish it tried to eat has blue-grey and yellow tones. Both use a lot of burnt umber paint, which helps to make them look like they belong together. Both fish have a coating of clear laqcuer, but there's a lot more of it on fish number one. Fish number two just got a light spray and has a more matte texture as a result.
Here's a close up of fish number two:
Here's a close up of fish number one's skull and fins, as well as a good look at fish number two: