How about an albino whale shark?

Or at least leucistic, based on what appears to be a bit of pigment at the base of the pectoral fin and, possibly, in the mouth (though those could be small remoras).  This was shot by a tour boat guide in the Galapagos and appears to show a female whale shark with no spots because she’s pure white.  I even hazard that she might be pregnant, given the slight bluge in the area above her pelvic fins.  Very cool