This Fish Cage/Pen is rectangular in shape for maximum size when bait cornering is not an issue, this is lightweight for its size and extremely strong. This fish & crab holding pen cage is designed for the serious fishing angler or guide fisherman who needs the maximum size fish/bait holding cage possible for their trophy fish catches or for species like shrimp or crab that typically don’t crowd in corners like other scared live bait fish species. One of its great features is the large dumping door right against the edge for the instant sliding motion/removal of all live fish or crabs etc. Simply turn the fish/live bait cage upside down for instant dumping into bucket or boat bait tank. Keeps LARGE fish up to 32″ in length (diagonally), healthy and fresh for long periods of time. No Fish Cage Aeration Needed! No Pumps to Burn Out!