Bandito Slurp Guns, also called a Yabbie Pumps, are used for catching tropical fish and invertebrates in hard to get to areas in aquariums and in the ocean or fresh water while diving and snorkeling. For most fish it is best to have the plunger drawn back. After you place the opening close to the fish, slowly push the plunger in, causing a current that most fish will swim into. Then suddenly pull the plunger back to trap the fish. They are also used to catch the bait that swims in the sand at the surf zone on the beach. Made of clear material that is about invisible to the fish when underwater. Comes in 4 different sizes to suit your needs, from 24″ to 36″ long, and two different mouth opening sizes. See the drop down menu under the main tabs for the specifics on the different models. Works great with the Bandito 2134 Tropical Fish Holding Bag. Made in The Florida Keys, USA.