Generally just messing around with the idea of having my sona be a Dobhar-chu.
For those that do not know, a Dobhar-chu is the Irish's weird 'crocodile'. It's appearance ranges from a killer fishy water dog, Otter with fish features, Otter looking being with crocodile features, or just a weird looking crocodile. Though it's usually as a fishy otter with orange feet. It has a life time mate, to which if 1 Dobhar-chu is at death's door it would whistle for it's mate to avenge it. They are said to be tough asses to kill.
That said I was mostly messing around with webbed scaled feet, a tail fin, and a set of antenna eyebrows in reference to the angler fish.