Do fish raised in tanks and fed substances containing pork fat and meat take the ruling of "al-Jalalah," whose consumption is forbidden, especially given the difficulty of purifying them?

If the flesh of fish changes due to the substances they feed on, they are then considered jalaalah, which refers to an animal that feeds on impurities to the extent that the taste, color, or smell of its flesh changes. The preferred (opinion) is that eating the flesh of jalaalah is disliked (makrooh). However, if their flesh does not change due to those substances, then they do not fall under the ruling of jalaalah.