Well, point I was trying to make was it could be sunlight not necessarily luster.
Regarding whale, it may be a bad joke but I was trying to point out that whale is not A FISH, its a mammal.
And everybody in PK say "WHALE (KI) MACHLI DEKHO"
Since you mentioned, I never knew that there are whales around Brasil or in Gulf of Mexico, I know they are there in North Sea esp. in summers, when they come around Shetland Island to feed on seals (Pani ki Billi):P.
Perhaps I am watching alot of NATGEO. Anyways, seems we are going off the topic, enjoy polishing..........
Cheers,
Kaleem