In the waters off Naples, Italy, a single 75-minute raid by poachers can net nearly 1,000 sea urchins, an in-demand ingredient in a dish popular with tourists. A haul like that can deal a significant blow to the local urchin population.In a healthy marine ecosystem, fish like sea bream feed on urchins, keeping populations in check. When poachers decimate sea urchin colonies, commercial fish move elsewhere to find food, threatening legal fishers’ livelihoods.Experts say Italy’s marine protected areas are particularly vulnerable. Although they have criminal penalties to deter poachers, the surrounding waters have been completely stripped bare of urchins, making them attractive targets.Now, scientists are collecting data from law enforcement operations to raise awareness and drive regulatory changes.

NAPLES — On a warm, moonlit night in May, Maurizio Simeone sat in an ambush at his desk about 10 kilometers (6 miles) south of Naples, Italy. The marine scientist and director of the Marine Protected Area (MPA) Gaiola Underwater Park was watching the grainy live feed from cameras surveilling the MPA as poachers descended on the seafloor.

“It was midnight. Here they were again,” Simeone told Mongabay. The poachers had come a few nights before to scout the area. Then a second time. This time, Simeone was waiting for them. He rushed to alert the Port Authority.