And here is another post seeking advice on retail South Asian obscura.
Maldive Fish is boiled, dried, smoked and hardened skipjack tuna, commonly used in Sri Lankan cooking. See http://en.wikipedia.org/wiki/Maldive_... The wiki indicates it may be produced in a manner similar to the Japanese Katsuobushi; aka dried bonito.
I have seen an online source, but before I dip in, does anyone know where this might be found in the metro area? I tried last night at Apna Bazaar in Bellevue to no avail.