Please write back. Thank you in advance for your help. Jill, First apologies for not getting back to you sooner.
Fish can be toxic in a couple of ways.
Secondly, fish can pick up toxins that occur naturally, generally through the food they eat. This is , in fact what we think happened to the humpback whale in the picture of me on WhaleNet. We think these whales were feeding on some fish that became unusually toxic from eating other fish that had eaten a small toxic single celled plant. The third way would be from man made chemicals that get into the ocean. The good news is that people are more aware of many of the worst things and have been working to limit the amount that goes into the ocean.