ORLANDO, Fla. (AP) — Southwest Airlines and SeaWorld Entertainment are ending their 25-year-old marketing partnership, officials with both companies said Thursday, as the airline has been urged by animal rights activists to terminate the relationship.

The partnership won’t be renewed at the end of the year when the current contract expires. As part of the partnership, three Southwest airplanes had various SeaWorld animals painted on their bodies. Those planes will be painted over to Southwest’s traditional look. SeaWorld also had Southwest signs in its parks, and Southwest offered vacation packages to SeaWorld, as it does to other tourist destinations. The vacation packages will continue.