Cyclops Pressure Compensator Fragment - where to find?

dziubo1

I cannot find 'Cyclops Pressure Compensator Fragment'. It's really last fragment i need, but even if wiki wirtes it schould be near Blood Kelp Zone Wreak part, nothing's there. Anyone had more luck?

TenebrousNova

I found it in the grand reef.

Voicedlight

It is in the grand reef.