I've seen the following on SP: Scorpions (rarely, just pick them up by the end of the tail (the stinger) and escort them outdoors), Tarantula's (put your hand palm down on the ground in front of the them and gently push them on the butt, they will crawl into your hand and you can escort them outdoors), boa's (leave them alone they're not harming anyone, kill rats and they aren't poisonous), Croc's (don't feed them or pet them, if you do you get what you deserve.) Landsharks (frequent beach bars and ladies night, more trouble than any of the above (still pretty harmless but let us know if not and someone will take care of it.))
You come to Belize to enjoy the wildlife not worry about it!