If swimmers have the jitters at Yokohama Bay on the Hawaiian island of Oahu, it’s with ample reason. The accompanying video shows an estimated 8-foot shark cruising the shoreline in waist-deep water–definitely too close for comfort. This occurred Sunday afternoon. Warning signs came down Monday but lifeguards were recommending that people stay out of the water.

Yokohama Bay is on Oahu’s west shore. A shark sighting also was made over the weekend at nearby Nanakuli Beach Park. Also during the weekend, two spear fishermen on Oahu’s North Shore survived a close encounter with a 7-foot tiger shark.

Brian Graziano had speared a fish and attached it to his dive float, then went to retrieve his dive partner, according to KHON News. When both divers returned to the float they were greeted by the shark, which was circling the divers and expressing interest in the speared fish.

Graziano said he poked and shoved the shark with his spear gun and it eventually left, but not before stealing the fish. Here’s a brief clip of that encounter, which occurred in 15 feet of water: