I've seen these items before and for the life of me, can't remember the names or where to find them. It's a series of 5 or 6 wearable items that have squids in the background/foreground?

Hm, from some old Keelhauliday items I found these:

There are also these items in the Cash Shop, which are not really squids but maybe it's similar to what you were thinking of?

Those were it. Thank you!

Items found, lock please?