1000's of Dolphins Congregating

[reeay]

I've read that dolphins may temporarily aggregate into larger pods so this occurrence is not out of the ordinary, perhaps.

Dolphins are social animals, living in so called schools of up to a dozen animals. In places with high abundance of food, schools can join temporarily forming aggregations of over 1000 dolphins.

http://www.junglewalk.com/info/dolphin-i...ion-P2.htm

Bottlenose dolphins commonly swim in groups of 2 to 15 individuals. Several groups may temporarily join (for several minutes or hours) in open ocean waters to form larger groups during which the dolphins may change associates

http://www.seaworld.org/animal-info/info...havior.htm