The multifunctional fish and lobster harvesting system is a device resembling a spear gun that uses an elastic band to propel a thrust shaft through a barrel toward a marine game animal. Either a spear point or a tri-barb gig can be coupled to the front end of the shaft and a lasso-snare is attached to the back end of the shaft. The shaft is propelled by the elastic band, with one end of the band attached to the handle and the other end attached to the back of the shaft. A user pulls the thrust shaft toward the back, stretching the band, and releases the shaft to propel the shaft toward a marine game animal. The shaft never leaves the barrel but stops via a travel limiter on the shaft. The device is able to be used with the back end facing forward to use the lasso-snare.
