The exit that Saleen saw was the end of the magic beast's intestine—the anus. It was fortunate that he was a mage. While he seldom dissected humans, he had researched many magic beasts, so the disgust lasted only for a brief moment.
The reason why he felt that was because he recollected what he went through in the intestine and what was being trashed about around him.
The waste shot out with Sika's bone piece, being sent flying for over hundreds of miles away, before sinking to the bottom of the ocean slowly.
Saleen did not struggle as he was sent outside the fish's body. Violent currents from the fish moving forward turned the seawater around them chaotic.
It was fortunate that the currents were ono threat to Saleen and his people, but he dared not allow them to venture outside the bone that housed them. The depth they were at was not a place that a level nine professional could survive in.