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52 Episodes 2000 - 2000
Episode 1
A new girl, Sea Filly (who is a seahorse) comes to Rainbow Fish's school and Rainbow and his best friend Blue welcome her.
Episode 2
Episode 3
Episode 4
Episode 5
Episode 6
Episode 7
Episode 8
Episode 9
Episode 10
Episode 11
Episode 12
Episode 13
Episode 14
Episode 15
Episode 16
Episode 17
Episode 18
Episode 19
Episode 20
Episode 21
Episode 22
Episode 23
Episode 24
Episode 25
Episode 26
Episode 27
Episode 28
Episode 29
Episode 30
Episode 31
Episode 32
Episode 33
Episode 34
After having a bad day with nobody having time for him, Rainbow wandered into coral formations and wished he was never born, but he soon took that wish back thank to a glowing white angelfish.
Episode 35
Episode 36
Episode 37
Episode 38
Episode 39
Episode 40
Episode 41
Episode 42
Episode 43
Episode 44
Episode 45
Episode 46
Rainbow tries to put Sea Filly in the Halloween spirit, then has a haunting Halloween dream, and wakes up to find Sea Filly has scared him in his sleep.
Episode 47
Episode 48
Episode 49
Episode 50
Episode 51
Episode 52