Explore recent community sightings of Spiny Orb-weaver (Gasteracantha fornicata) — where it's been spotted, related encounters, and field notes from local observers. Meet the Spiny Orb-weaver, a stunning arachnid easily identified by its vibrant, crab-like abdomen adorned with six prominent, sharp spines. You will often spot these colorful gems suspended in intricate, circular webs throughout Australian forests and gardens.