DLNR: 50-60 coral colonies were damaged by lane markers from canoe regatta : Maui Now
Approximately 50-60 coral colonies sustained a range of minimal-to-significant damage from 60-pound cinder blocks placed in the ocean for a canoe regatta on Hawaiʻi Island last weekend, officials said. Dive teams with the state Department of Land and Natural Resources, Division of Aquatic Resources spent Tuesday documenting and photographing damage at Kailua Bay.
Source: mauinow.com