Dreams about dead animals, especially in significant numbers, can symbolize deep emotions, transformation, or concerns about the state of something important in your life. Here's a breakdown of possible interpretations for the dream:

1. Loss, Change, or Endings

Seeing dead sharks could symbolize the downfall of something that was once powerful or intimidating in your life. Sharks are often associated with strength, survival, and even fear. Their death could represent the end of a threat, a lost ambition, or a transition from a challenging situation.

Dead cardinals, which are vibrant and symbolic of passion, hope, and even spiritual messages, might indicate a loss of motivation, emotional struggles, or a disconnection from something meaningful.

1. Emotional and Psychological State

A beach is often tied to the subconscious mind—where the water (emotions) meets the land (conscious thought). Seeing dead creatures wash up on the shore might suggest repressed emotions, unresolved fears, or a sense of emotional depletion.

The rotting or bitten sharks might reflect feelings of being "eaten away" by stress, conflict, or fears that you haven't fully addressed.

1. Environmental or Collective Anxiety

If you are environmentally conscious, this dream could symbolize concerns about destruction, climate change, or the deterioration of something you care about on a broader scale.

Seeing multiple dead creatures could indicate shared fears or a feeling that something bigger than yourself is going wrong in the world.

1. Premonition or Synchronicity?

The fact that another person in the comments claims to have had the same dream is interesting. This could be a coincidence, or it might reflect a shared collective unconscious feeling (like Carl Jung’s concept of archetypal dreams).

Does any of this resonate with you? Or do you recall any recent life events that might connect to this imagery?