This owner hit a nasty patch of eel grass. All the eel grass wound up in the basket, exactly as it should, not clogging the intake seacock, hose or elbow.
Cleaning this required no diving, no shrinkage ("I was in the pool" George Costanza) & no danger. Simply removing the strainers clean out cap and lifting out the SS basket was all that was required.
This is a 1" Groco ARG-1000-S bronze strainer with 1" Groco bronze sweeping elbows feeding it.