Oh no! Try this, maybe. It's gotten completely rid of all signs of that creepy fish so far. (Make sure to erase all the previous code for the creepy fish, so they don't muck each other up.)

/*CREEPY FISH*/
.loading img {width:0px;height:0px;
filter: alpha(opacity=0);-moz-opacity: 0;opacity: 0;}

.loading{
background:transparent url() no-repeat scroll center top !important;
margin-top:30px;
height:0px;
filter: alpha(opacity=0);
-moz-opacity: 0;
opacity: 0;
zoom:1;
}

#div_loading {filter: alpha(opacity=0);-moz-opacity: 0;opacity: 0;}