These are three videos I took from my pervious trip to Venezuela in 2008. These Cephalosilurus apurensis were huge. About 6 or more in a huge tank. As you can see my hand could fit in the mouth of one of them. These were more than 2 feet. Some I swear were a metre in length. I had a private tour of the zoo as it was closed do to renovations. I had relatives explain that I travelled far and plus I correspond with a major supplier of fish to the zoo and it helped me get in.