Doradidae (Thorny or Talking Catfi shes)
Doradids are found in tropical South America. Although
most doradids have a generalized catfi sh
form, they generally have at least a single row of
plates with large spikes running down their sides
(Figure 6B). Birindelli et al. (2009) described the
swim bladder variation of doradids and found it to
be extreme, with some bladders having many thin
diverticula of unknown function coming off of a
generally heart-shaped chamber. The function of
these diverticula is unknown.