VICTORIA - An advocate for whales says many collisions between vessels and the animals are likely undetected or unreported as Fisheries Department investigates another death of a humpback whale off B.C.'s coast.

Caitlin Birdsall, executive director of the Marine Education and Research Society, says the whale discovered Nov. 8 off Lasqueti Island in the Georgia Strait near the Sunshine Coast and is the third confirmed death since late September.

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