*rattles old brain cells* Well I know it's not an animal, even though you've put the picture in a thread with penguins, whales and bears. But your 'good clue' is "...a toss up between this and crab." (animals??? ) Soooo I'm going down the path of a mythological animal which symbolizes a Southwest destination.
*drums fingers on desk* which makes no sense.
I don't have enough info, so I'll ask for another clue, and Randy I warning you, if the answer involves some secret Southwest symbol/code....

Keep'em flying