Pontomalota opaca is one of the smallest rove beetles found under kelp wrack. Their size range is from 2.5mm to 3.5mm and can easily be distinguished by its golden color and dark spot on the lower half of the abdomen. These beetles are seen sparsely throughout local beaches. They are much more common in summer months where most beetle populations are at their peak. P. opaca scavenges dead flied and other decaying arthropods, as well as, smaller fly larvae.