DULUTH — Supporters of a Duluth zoo are speaking out against an idea to get rid of the animals as the city mulls over its options for the costly attraction.

City officials explored a series of options last week as they tried to decide whether to transform the Lake Superior Zoo into a different kind of public place, such as an adventure park or  a park with an event center or amphitheater.

According to a press release the city estimates the zoo is in need of upgrades costing at least $12 million, plus an annual subsidy of about $500,000 to cover operation costs.

But members of the Lake Superior Zoological Society say the zoo has great financial value and that it also makes Duluth a better place to live and visit.