Galapagos Sargasso Grass (Bifurcaria galapagensis)

This alga species was once one of the most common species growing in the lower intertidal and shallow subtidal habitats on the Galápagos Islands, but disappeared after a devastating El Niño event in 1982/83.

The species is now considered extinct. [1]

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References:

[1] Graham J. Edgar; Stuart A. Banks; Margarita Brandt; Rodrigo H. Bustamantes; Angel Chiriboga; Lauren E. Garske; Peter W. Glynn; Jack S. Grove; Scott Henderson; Cleve P. Hickman; Kathy A. Miller; Fernando Rivera; Gerald M. Wellington: El Niño, grazers and fisheries interact to greatly elevate extinction risk for Galapagos marine species. Global Change Biology 16: 2876-2890. 2010

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edited: 29.11.2018