Yes.
But keep trying and learning.
I actually like #1, but it needs a tighter crop. It's a pretty cool abstract.
#2 is almost there, but blurry, out of focus. But don't be disheartened, shooting into an aquarium isn't the easiest thing. Also, your subjects (fish) are dead center. There is a time and place for centering your subject. The rock on the left is boring, but there seems to be more interesting stuff on the rock to the right. Framing that way might help.
But first work on your focus.
#3 is not focussed well either. maybe crop a little off the top, the dark stuff in particular. The subject could use the headroom, but not that much. Find the nice balance.
#4 similar to above. But here to me, the red stuff at the top seems rather extraneous.
Keep after these shots, nail the focus, and work on composition. Definately interesting subject matter.
:thumbup: