From the DEP anglers guide - PG 10

Quote:
Alewife & BLUE BACK HERRING
Emergency Fishery Closure is in effect:
Taking of anadromous alewife and blueback herring is prohibited from
all Connecticut waters including Long Island Sound.

Landlocked alewife
Landlocked alewife populations are established in several Connecticut
lakes and ponds (see page 18). Landlocked alewife may be taken by
angling or scoop net only from the following lakes:
Amos Lake Crystal Lake (Ellington) Rogers Lake
Ball Pond Highland Lake Squantz Pond
Beach Pond Quassapaug Lake Uncas Lake
Candlewood Lake Quonnipaug Lake Waramaug Lake


I thought this came up last year and it was ok to use frozen store bought herring if you had a receipt or they suggested keeping a receipt. Do a search of the forum and see what you come up with.