Commodities of Martian Rails: Fish

Martian Rails (2009), the crayon board game manufactured by Mayfair Games about railroading on the Red Planet in which players build tracks and haul freight, has a long list of cool commodities that players can transport to generate revenue for their rail companies. For example:

Fish -- Crossbred Martian and Earth water creatures that live in the canals. They are food sources for humans. The native Martian fish were rare and not particularly nutritious but they could survive the harsh climate.

Martian Rails is loaded with references to Martian SF!