Here are some rules from the Fisheries Act of Canada.
Throwing overboard of certain substances prohibited
36. (1) No one shall
- (a) throw overboard ballast, coal ashes, stones or other prejudicial or deleterious substances in any river, harbour or roadstead, or in any water where fishing is carried on;
- (b) leave or deposit or cause to be thrown, left or deposited, on the shore, beach or bank of any water or on the beach between high and low water mark, remains or offal of fish or of marine animals; or
- (c) leave decayed or decaying fish in any net or other fishing apparatus. Marginal note:Disposal of remains, etc.
(2) Remains or offal described in subsection.
(1) may be buried ashore, above high water mark.