The full answer
Fish is permissible to eat and does not require the Zabiha slaughter required for cattle or poultry.
However, preparation still matters.
A fish dish cooked with wine, Haram ingredients or contaminated during preparation should not be treated as automatically acceptable simply because the main ingredient is fish.
Answers in the Halal Knowledge Center reflect the standards followed by Halal Monitoring Services (HMS), which operates as part of the Shariah Board of America. HMS certifies only what it checks.