Come on, dream interpreter. Very complicated dream.

Let me make an inappropriate assumption, assuming that these two creatures in the dream represent two people in your life, and may also include yourself, then the relationship between these two people is fierce. When one party wants to show something, it is bitten off by the other party, which smells like verbal dispute and competition, and there is also a process of struggling to survive in the relationship. Does it confirm some situations in your life? And these two people are still reluctant and passive. In the same space, the struggle seems inevitable. It may be difficult to understand each other and avoid quarreling.

Suppose these two creatures in the dream represent two abstract things, two choices, or two ideas. It seems that you are accepting two conflicting ideas at the same time, and it is difficult to merge and conflict in your mind. Maybe you can't have it both ways. Do you choose turtles instead of fish, or do you choose turtles instead of fish? It depends on your personal preference. My personal opinion is that fish's teeth are too sharp to tolerate other differences.

Finally, suppose that two kinds of creatures represent a part of your heart, maybe you need to have a look inside, how to make the fish less unsafe, maybe you can feel at ease without showing your teeth? Or learn how to live in harmony with such fish. Does it need comfort or does it want to take beneficial nutrition? How to satisfy the inner fish and make it happier? How to make the tortoise stretch his head with peace of mind, do things without compromise, and take good care of himself and others?

Some humble opinions, I hope to help you.