A adult male or even female iguana is dangerous to any lizard putted with it, unless in a huge enclosure (ROOM size) it is hopeless try to house more then one iguana per enclosure and even then really dangerous figths can happen and under no circunstances should 2 males be kept together. As for iguana and basilisk combo NO, the basilisk doesant stand a chance. Now people have kept them more or less sucessfully with water dragons, cuban anoles and tokay geckos, but once again your terrarium barely is enough for your female, let alone another lizard species combo. If you upgraded...