I post a lot of pictures of Herons and Egrets catching fish because I spend hours and hours watching them hunt. It is truly fascinating to me. Here we have a Snowy Egret taking an approach from the side to snag a minnow.
I do not believe that there are any teleconverters that are compatible with that lens
https://www.graysofwestminster.co.uk/pdf/products/AF-S-teleconverter-compatibility.pdf