(Portland, OR) -- A bloom of toxic algae in the Willamette River is shrinking. The Oregon Health Authority has reduced the size of the advisory to the Ross Island Lagoon and Willamette Cove. The algae releases cyanotoxins that can be harmful to people and pets if swallowed. Pets and small children are especially vulnerable. People and pets should avoid areas where the water is foamy, scummy, thick like paint, and pea-green or blue-green.