Is it my imagination or have they made the Sea Bass shadows real big in New Horizons?
It is. I looked up shadow sizes, and the sea bass shares the same shadow size as Coelacanth. There are also now apparently 6 shadow sizes instead of 3.
coelacanth
I've caught more than I can count in New Horizons, so they aren't very rare. You bound to find one if you keep at it for an hour or so