Can someone tell me how far along am I to completing this title? Can anyone tell how many fishes I actually need to catch to obtain this title?

That information isn't presented in the game itself, but we need to check it on 3rd party websites like BDO Codex. There I at least get the info, that I need to catch total of 446 Gurnard fishes to get this title.

But I still can't check how far along am I to acquiring this title. I believe those informations could be provided in the game under title description.

You can use fish guide for count:

Thanks mate, I didn't know that was even in the game. Now I can keep track of my fishes :)