Whale appears alongside yachts in affluent Buenos Aires neighborhood

People watch a lost whale in Puerto Madero, Buenos Aires, Argentina, Monday, Aug. 3, 2015. (AP)

A lost whale swims near boats in Puerto Madero, Buenos Aires, Argentina, Monday, Aug. 3, 2015. The whale appeared in a port of one of Buenos Aires most exclusive neighborhoods, periodically surfacing alongside luxury yachts while attracting hundreds of onlookers. (AP Photo/Natacha Pisarenko)

A lost whale swims in Puerto Madero, Buenos Aires, Argentina, Monday, Aug. 3, 2015. Authorities have not identified the type of whale, and it's unclear how they will get it back to sea. A port police boat is traversing the waterway, apparently trying to lure the animal to the connecting Rio de la Plata river, which feeds into the Atlantic Ocean. (AP Photo/Natacha Pisarenko)

People watch a lost whale in Puerto Madero, Buenos Aires, Argentina, Monday, Aug. 3, 2015. Authorities have not identified what kind of whale it is, and it was unclear how they would get it back to the ocean. The waterway connects with Rio de la Plata river which leads to the Atlantic Ocean. (AP Photo/Natacha Pisarenko)

A man sells sweets as people watch a lost whale swiming nearby in Puerto Madero, Buenos Aires, Argentina, Monday, Aug. 3, 2015. The whale appeared in a port of one of Buenos Aires most exclusive neighborhoods, periodically surfacing alongside luxury yachts while attracting hundreds of onlookers. (AP Photo/Natacha Pisarenko)