What is the meaning in a dream of shark

I was at a friend's house, and his parent's bed was in the middle of the house. next to the bed, some stairs lead to an underground animal room. the first room had fish tanks. a bed with fish tanks around it. but it is all crocodiles, sharks and piranhas. the friend threw food at us so that the crocodiles could eat us or the food. in the second room was a kid's play area with what looked like a black lion and a white lion, somehow I ended up in the play area. the entire place was deflating like a jumping castle and the cage to the lions were open as I exited the gate a lion was in front of me as I turned around it grabbed me on my shoulder. then it cut to me being on a highway trying to tell people there was a zombie attack happening. everyone is dying around me. and everything repeated again

This dream is less frequent than the shark dream, however when I dream this, I am always far along in a pregnancy, and I can see my body from a distance. I always know that I am pregnant, and the father seems to be irrelevant. Recently I dreamt this dream, but the father was someone from the future. I was watching the father play as a child, but I knew I had his child from the future. His family was placing a lot of pressure on him at the time, and I told him not to worry about those things, that better things would come

I dream I am either on a boat or in water but its always a large body of water. Sometimes a stream and I’m moving along trying to get to the end, or sometimes it is quite deep, and I am in an underground water cavern. But I am always afraid and looking at the sharks swimming trying to not get bitten. Sometimes they are chasing me, sometimes I am hiding trying to get by unseen.