Upgraded my world to 1.13.2. And after a day of swimming around and playing realized something. All the dolphins and fish are gone.
MC-143990
All the fish are gone.
Resolved
Invalid
0
Ok more on this... after logging this Jira I thought to tp myself to the nearest dolphin.
/tp @p @e[type=dolphin,limit=1]
It sent me a great distance away and after swimming back the entire way, my fish are back. The area it sent me to was an area I was in after upgrading that I travelled to by neither portals.
Weird that there was no fish spawning in the spawn point area.