Cactus

There have been many cacti associated with the Creatures series:

Creatures 2

 * Spinnomosa (lime green cactus)
 * Spikeocausius (darker green cactus)

Creatures 3/Docking Station

 * Cacbana (Desert Terrarium)
 * Matu Cactus (Twilightcat and Bug)

Other

 * Fishing Cactus, developers of Creatures Online