(2) This fish grazes on sea anemones, sea squirts, sponges, and other benthic organisms. It spends all of its time vertically and is so slow and clumsy that I had to give it some additional defense against predation. When threatened, reflective chromatophores in its sides produce a mirror that reflects the predator back at itself. If this fails, it can also produce images resembling larger predators.
(3) This fish also grazes on benthic organisms and is an even worse swimmer than the last. It's only defense is its tailfin reduced into just two long, venomous spines. When threatened, it waves its tail around. It has poor aim, but only very desperate predators take the chance in attacking because the venom is extremely potent.
These pictures likely represent three families in the same order. Reader challenge: What additional defenses might fish like this have? Where do they lay their eggs?