Season 5 aired between 16 Oct 2012 and 24 Apr 2013, 26 episodes.
Episodes
E01
The Spill
16 Oct 2012
E02
The Rise of Tritannus
17 Oct 2012
E03
Return to Alfea
18 Oct 2012
E04
The Sirenix Book
19 Oct 2012
E05
The Lilo
22 Oct 2012
E06
The Power of Harmonix
23 Oct 2012
E07
The Shimmering Shells
24 Oct 2012
E08
Secret of the Ruby Reef
25 Oct 2012
E09
The Gem of Empathy
26 Oct 2012
E10
A Magix Christmas
29 Oct 2012
E11
Trix Tricks
30 Oct 2012
E12
Test of Courage
31 Oct 2012
E13
Sirenix
09 Dec 2012
E14
The Emperor Throne
17 Feb 2013
E15
The Pillar of Light
24 Feb 2013
E16
The Eclipse
03 Mar 2013
E17
Faraway Reflections
10 Mar 2013
E18
The Devourer
17 Mar 2013
E19
The Singing Whales
31 Mar 2013
E20
The Problems of Love
31 Mar 2013
E21
A Perfect Date
07 Apr 2013
E22
Listen to Your Heart
14 Apr 2013
E23
The Shark's Eye
19 Apr 2013
E24
Saving Paradise Bay
22 Apr 2013
E25
Battle for the Infinite Ocean
23 Apr 2013
E26
The End of Tritannus
24 Apr 2013