Systems to use this sort of unique photography : there are several systems to employ the digital Chroma Key photography efficiently and effectively. Nonetheless you must make sure that a subject isn't brightly illuminated. Brilliant light falling on the topic or background may cause glare on a picture. Spots can happen either on the topic or at the background. Sadly , there doesn't appear to be a picture showing the fish at this size. There are lots of on Google Photographs , but the bigger of these record the weights at about 250lbs – a ways off from 660lbs. However , the photographs do show a real likeness and one has to use ones imagination to get up to the 660lb mark. Footage show up to 3 folk sitting holding the fish. Following this then, about eight folks would be wanted to hold the largest of them. Compare this with the undeniable fact that catfish are related to tiddlers and the commonly known goldfish. Catfish or Barbel though , to qualify, must have one pair of barbels ( long spiky hairs ) on their higher jaw but might also have them in pairs on the muzzle and on their jaw. As an example : The Malapterurus electricus, widely distributed in Africa, is a surprising species, able to generate up to 450 volts which it uses to protect itself and to capture prey. Folk keep it in aquariums and seemingly it grows to recognize people who feed it. Fat, just underneath its skin, insulates it against its own electrical charge, its head being the negative pole. These amber gels are colourful plastic sheets that add colourful reflection on a subject. To get round this refection, you may use butterfly sheets or cut back the amount of light falling on the topic and the background. You can perform overlay transition of 1 or 2 pictures.