Things ARE fine today. The United States has an economy that is literally the "envy of the world" and "The American economy has left other rich countries in the dust" according to The Economist - very low unemployment, low inflation, booming stock market, record oil production, and strong growth:
https://www.economist.com/special-report/2024-10-19
That said, radical changes to the current path - like a tariff war and/or disruption to global trade through issues with the Panama Canal - could change course. We'll just have to see.
As others have posted, exports of (aquarium) fish from Central America are negligible. New tariffs likely wouldn't change that. Seafood prices could be higher (for farmed shrimp and other items sources from there, though).
Who knows on imported Asian fish. What WOULD be affected though, is cost of most of our aquarium supplies - filters, heaters, etc. - almost all of which is sourced from China. And, of course, ALL the stuff sourced from China (90% of Wal-Mart, Dollar Tree, etc.) would be more expensive with new tariffs.
We'll just have to wait and see...
This is the type of thinking that the fearmongers want us to have.
Today, things are fine. Live in today.
Its hard to go much farther into this discussion without taking into the direction of a political conversation, which has no place on a fish forum. And even then, it becomes a "what if" debate, discussing what "might" happen and what we should do if our fears or hopes come true.