If you see someone walking around with their mouth wide open, a vacant expression on their face, you can bet they're just feeding: sifting air krill.
The Denny's patron appeared to be sifting air krill, but it was possible he was only yawning.
Something that is so sea-creature-tastic, it simply has to be described by a clever pun on a Fergie lyric. See also: fergalicious
Man, last summer at the beach house was totally krillalicious.