Bathymerty for the galapagos islands is available from.
GETTING A COPY OF THE GRID OR THE RAW DATA:
You are welcome to use this data in any publication or proposal, if it is accompanied by an acknowledgement such as "Bathymetric data compiled by William Chadwick, Oregon State University". If you would like to download a grid of this bathymetry (via ftp), click on one of the following links. The grid is available in GMT (Generic Mapping Tools) version 3 grid format ("galap.grd") or ArcInfo Interchange format ("galp1000.e00").
... Note, you probably need to click and hold down with your right mouse button and then choose "Save link as..." from the pop-up menu (this tells your browser that this is a binary file that you want to save to disk, not display on the screen, because it probably doesn't know what kind of file ends in *.grd or *.e00).