The meaning of many in dream | Dream Interpretation
little fish in round container: could be sperm, or depict becoming, or wanting to become, pregnant. Example: ‘Last week I suddenly started having a recurring dream. In it I woke, walked downstairs, went into the kitchen and looked in the kettle. It was full of little fish’ (Karen).
The fact that Karen goes ‘downstairs’, suggesting the lower part of her body, and the shape of the kettle, which is a round container, make it likely this dream is about pregnancy. See Christ under archetypes; religion and dreams, sea. Idioms: big fish, big fish in a small pond; cold fish; fishing for compliments; fish out of water, queer fish; smell something fishy.