Have you noticed a pattern with OOO's full colored Combo form debuts?

[RiderKing]

It seems that in most of Kamen Rider OOO's single colored Combo debuts, the Yummy he fights is one of Mezool's aquatic-themed Yummys. Let me show you:

Episode 6: GataKiriBa fights the Piranha Yummy
Episode 9: LaToraTar fights the Same/Shark Yummy
Episode 12: SaGoZo fights the Ageha/Swallowtail Butterfly Yummy (Uva's Yummy)
Episode 20: TaJaDor fights the Lion-Kurage/Jellyfish Yummy (Half Kazari, half Mezool)
Episode 24: ShaUTa fights the Itomakiei/Devilray Yummy (Originally the Ei-Sai/Sting Ray-Rhinoceros Yummy (Half Mezool, half Gamel))

You see? Other then SaGoZo, all of the single colored Combo's first fights were against an aquatic-themed Yummy. Why does Toei keep doing this?

 

[Ryuutaros]

If you look closely at the different helmets they have black lines on their cheeks that makes them numbered. Taka has one line, Kugawata has two lines, Lion has three lines.

 

[musashi03]

It seems that in most of Kamen Rider OOO's single colored Combo debuts, the Yummy he fights is one of Mezool's aquatic-themed Yummys. Let me show you:

Episode 6: GataKiriBa fights the Piranha Yummy
Episode 9: LaToraTar fights the Same/Shark Yummy
Episode 12: SaGoZo fights the Ageha/Swallowtail Butterfly Yummy (Uva's Yummy)
Episode 20: TaJaDor fights the Lion-Kurage/Jellyfish Yummy (Half Kazari, half Mezool)
Episode 24: ShaUTa fights the Itomakiei/Devilray Yummy (Originally the Ei-Sai/Sting Ray-Rhinoceros Yummy (Half Mezool, half Gamel))

You see? Other then SaGoZo, all of the single colored Combo's first fights were against an aquatic-themed Yummy. Why does Toei keep doing this?

Either it's coincidence, Toei hates aquatic-themed creatures, or Mezool is going to be the big bad in the end.