If you can collect like this, then you should really consider making this a biotope aquarium. I've got a Florida one in the journal section. Your rocks from the region too, so might as well.
The animal in the second picture is called a chiton, very good algae eaters. I've got a fuzzy chiton in my FL biotope.
I'm not sure what species yours is though.
Just be careful that...
A. You don't get arrested for collecting, I'm still worried about that with you
B. That you make sure the species you collect are tropical, the snail, to me, is suspect. Some are colder water species that only tolerate a seasonal rise in temperatures but would slowly bake to death in the home aquarium that's kept at constant temperatures.
C. Watch the anemone, they can travel about. If it gets caught in your powerhead, very dead anemone. How big is it? The pink tips to the tenticles makes me wonder if it isn't a baby condy anemone? We face each other on the same ocean, so we may share critters in common. Most anemones will get too big for your tank, so you may have to take this little guy back.
L