Never made it to the Lion. Back then I was single, living in Alaska and eating the cheapest I could. Fine dining is definitely a thing of the last decade for me! 
I in no way mean to cast aspersions on your taste or what you consider high end (I, for example, have continued to eat at restaurants that received “B” health ratings), but every time I walk by the Cass Street Bar and Grill it literally smells like a dirty gas station bathroom. Literally. I am not hyperbolizing at all. I cannot recall a time when the 10 foot radius around their front door did not reek of urine. I’ve been in plenty of seedy bars whose bathrooms reek, but never one that smells that bad at the front door. Not even in TJ.
So do you not smell it or is the fish burger so good you don’t care? That would have to be a really good fish burger. I am genuinely curious. And again I don’t mean to cast aspersions, but I would probably rather lick the chewing gum pole at Bayard and Garnet than go in to the CSBandG. OK, so that was hyperbole.
For all of those recommending the Oceanaire… you do realize that it is a (gasp) chain don’t you. I thought that was an automatic disqualifier for the posters here.
That said… the one in Indy is quite good.