We like fish that are green. Fluorescent even better. Green fish are the best fish we would think you'd agree. Fish can be friendly if you don't try to pet them. You really should not pet them. Petting them just might hurt them. You really should just take pictures for all to see. Some fish perform research joining with scientists to find out if pollution is really present. These fish could save lives by detecting toxins. They fluoresce to shine signal. They can not speak to signal. But they can still save lives by using science. If you want to keep fish they are really easy. You just need to feed them but not too much. Excess food builds up inviting disease. You don't want disease. Disease can prove quite fatal to fish, and to you and me that you'd agree.