Are the iguanas big or aggressive enough to cause a danger to the public? ................ They come in different sizes and colors. The largest I have seen was about 3’nestled in the dunes. On the average I’ve seen them around the 2’ size. We have a couple here running around that are emerald green. They don’t bother the dogs or cats as far as we know. I would think they would be tasty morsals for the local gators. Those we have in the larger sizes. The biggest compaint we hear on the Island is that there are too damn many of them (Inguanas). Maybe because there is too much Inquana Guamo? They do like bird’s eggs and turtle eggs I hear, so that could be the major problem.
IIRC, adult iguanas are vegetarians - the juvies will munch on bugs. Monitor lizards, OTOH, are aggressive carnivores and not a native species.