Great pictures!
The first looks like a jewel cichlid with a pointy face, what is that?
In the second photo, there's a pregnant minnow in the lower left. Four sailfin mollies, another minnow at the top, and I always wondered what those two with the stripes are called. Any idea?
Fourth pic of the big pleco is awesome. Those are hard to catch, they takeoff the second they spot you on the bank. Sometimes if your lucky, they go into the grass if the water level is high enough (instead of into the deep), and you can find them wound up into the grass rhizomes and roots. Looks like that might be what Rodolfo was doing in the third pic.
Fifth pic is a big sailfin molly.
Seventh pic looks to be a Mayan Cichlid, nice find if it is.
By the way, you should upload the pics here to our photo gallery, oftentimes I see people post pics from photobucket and then remove them only to have the pics on the thread disappear :P