Mattel Inc. issued another recall Thursday affecting 55,500 Fisher-Price plastic boats because the paint contains too much lead, the U.S. Consumer Product Safety Commission said in a statement on its Web site.

The El Segundo-based company has already recalled 21 million Chinese-made toys so far this year.

The boats, which are made under Mattel’s Fisher-Price brand, feature the “Diego” character and cost $15 each, the commission said.

Earlier this month, Mattel reported surprisingly strong third-quarter earnings that were hit by a $40 million charge associated with the recalls, the company said.

Shares in Mattel were down 1.2 percent to $20.66 in afternoon trading Thursday on the New York Stock Exchange.