>>57968620 (OP)So out of curiosity looked through the pokedex to see if I could find other mons that 1. Blue 2. Based on an aquatic creature 3. Are not Water Type. This is all I came up with.
>Dratini & DragonairKind of having to stretch the definition of aquatic creature here but it has been portrayed living in lakes in other pokemon media.
>AltariaAgain, kind of having to stretch the definition of aquatic animal. But Golduck, Swanna, and Peliper are water types for being birds commonly associated with water. If you choose to see Altaria as specifically a swan or goose it fits but again that is with a big asterisk as it clearly has multiple points of inspiraations from different birds and myth.
>EelektrossOne of the first that definitely fits all the criteria. Although it is mitigated somewhat by its whole thing being it levitating and swimming through the air.
>Inkay & MalamarMight just be colorblind on this one.
>NihilegoWas thrown off by this things typing on first encounter but still thought it was ghost before water.
>CrabrawlerGenuinely forgot this thing is mono-fighting like Grapploct. Definitely fits as its brother in arms for blue aquatic pokemon that is not a water type.
Thats all I could come up with.