Considering it's deep enough to cover Pecorine up to her hips, it's deeper than that. Still, I would guess it's no more than 1 meter deep.
Nya!Fuah!?The ocean's pretty nice.It's so vast...
Natural, quiet, abundant...Karyl-chaーnOwaah!?
Wai-!
Don't shake it!
Gonna fall!
I'm gonna fall off!Huh?
Karyl-chan, you can't swim?Nya~*Sploosh*
*Sploosh*W-What's wrong with that!?Ehー? But...Nyaryl-chan's just swimming away over there...Nya~ ♪How come you can swim!?
T-That's so cute...Oh my gosh~ ♪ Geez, Nyaryl, you're such a ge~nius ♪But that is adorable, so I'm gonna hold her later too.Nyaー ♪
Mya~ ♪Mm~ ♪
Such a wittle cutie~ ♪*Tickle tickle*Karyl-chan's such a doting parentー