Cultch

• (n.) Empty oyster shells and other substances laid down on oyster grounds to furnish points for the attachment of the spawn of the oyster. • (n.) Rubbish; debris; refuse. • (n.) Young or seed oysters together with the shells and other objects to which they are usually attached.
Found on http://thinkexist.com/dictionary/meaning/cultch/

Cultch

Cultch (kŭlch; 224) noun [ Etymol. uncertain.] Empty oyster shells and other substances laid down on oyster grounds to furnish points for the attachment of the spawn of the oyster. [ Also written cutch .]
Found on http://www.encyclo.co.uk/webster/C/201

Cultch

Cultch noun 1. Young or seed oysters together with the shells and other objects to which they are usually attached. 2. Rubbish; d├ębris; refuse.
Found on http://www.encyclo.co.uk/webster/C/201

Cultch

any substrate laid on the seabed with the purpose of encouraging mollusc larvae (spat) settlement. Examples are shell waste, ropes and tiles.
Found on http://www.encyclo.co.uk/local/20740

Cultch

Any substrate laid on the seabed with the purpose of encouraging mollusc larvae (spat) settlement. Examples are shell waste, ropes and tiles.
Found on https://www.sustainweb.org/goodcatch/glossary_of_seafood_terms/

cultch

flooring of an oyster-bed; rubbish
Found on http://phrontistery.info/c.html
No exact match found