The Glenelg tyre reef is a series of tyre tetrahedrons, set down as an artificial reef. Set up in 1983, 500m south east of the barge.

As a fish breeding ground it has been very successful with large quantities of whiting, bullseyes, strongies, silver dimmer, old wives and spider crabs.

The main hazard is getting loose regs and gauges caught in tyre straps.