Katey, The cats is cool, you might crop the bottom to get rid of the brown although, that might leave the cat floating in space. Its a good shot and great expression.See how you like it in different crops.
Same with the fish. I love the capture - the fish is perfect. Id like to see him pop a bit more as the orange fish draw my attention. Good use of the rule of thirds. The lip (stone) should come in more or be cropped. Possibly try to make the subject fish pop color wise a bit more? In a photo editor, I mean.
Keep up the great work!