Dictionary of Ichthyology  

pier = a narrow platform providing access from the shore to deeper water for landing or as a recreational facility. May be floating or fixed on pilings built out into the water but usually of open construction. Often used for fishing.

Brighton, South Australia (described as a jetty, q.v.), Wikimedia Commons: http://commons.wikimedia.org/wiki/File:Brighton_Jetty.jpg

Canadian Museum of Nature