So, I installed Tide and I found a problem that Vanilla fish and fish from other mods just dont spawn naturally in the world when using Tide

Hey, I've had the same issue. Mostly the same as BlueDrakon with very sparse spawns, but I can also see modded fish from mods supported by Tide (so Alex's Mobs, Fins and Tails, Fish of Thieves, and Unusual Fish) with the same low spawn rate. I also can't see any vanilla fish or any fish from unsupported mods (namely Upgrade Aquatic) spawning at all.

I am experiencing this as well. I really love this mod and I hope they fix it as soon as they can, that way I can play it again in my modpack.

Do the tide fish still spawn? It’s possible that the tide fish might be filling up the mob cap.

The Tide fish do spawn, but very sparsely. For example, Warm Oceans/Coral Reefs have no fish (vanilla or modded), just basic squids. Rivers seem to have more frequent Tide spawns, but again, no vanilla fish. I'll continue to test as well to see if it's a mod compatibility issue or Tide itself.

Hi, turns out the fish did spawn abundantly in my case. It's just, they won't spawn at all until I disable the hide fish names as "???" feature in the config settings. Interesting.

they won't spawn at all until I disable the hide fish names as "???" feature in the config settings.

For anyone else experiencing this issue, do this for now. This will be fixed in Tide 1.6.