Frowned upon in the teaching is killing, and that includes any creature that lives on the breath of Brahma. Brahma is the Protector of all beings and the teaching is to do the same. As a consequence, the approved diet for sustaining human life is vegetarian. Here’s a verse from the Rgveda.
Compassion to see is giving so to go to a female fish and to live by having to kill is subject to contempt as this kills a mother for an occasion as this.
The Authority is the heaven breath to go towards and to spit out to an appearance with compassion.