Nautilus Shell on ocean ruins suspicious blocks

Nautilus shells dont have many ways of being acquired ,including them in suspicious sand/gravel on ocean ruins could give an alternative or help to those looking to build a conduit without drowned farming or fishing.
It also fits quite well the archaeology theme along with the sniffer,as it is a fossilized shell of an animal.

And third it gives more of a reward for ocean raiding that arent chasing for pot sherds or sniffer eggs