Tiger Sharks: In at the Deep End

The Tiger Sharks always use an appropriate camouflage scheme. In addition, a yellow band with black tiger stripes is painted on the lower arms and legs of 'Mechs, wings of aerospace fighters, and on a strip down the center hull of vehicles.

Per Mercenaries Supplemental 2, page 62.

Other references:
Whitworth, Mercenaries Supplemental 2 (color plates)

A yellow shark with black stripes is their insignia. Per FM: Mercenaries Supplemental II, page 62.