Fishermen have taken 37 bottlenose dolphins to be put into captivity , conservationists say . Many of the remaining whales still in the cove in Okinawa , Japan , will be slaughtered , they say . Local ##s have previously defended slaughter of dolphins as a traditional practice . Environmental ##ists say dolphin meat contains dangerously high levels of mercury .
Fishermen have taken 37 bottlenose dolphins to be sold into captivity , conservationists say . Many of the 200 dolphins still in the cove in Taiji , Japan , will be slaughtered , they say . Local officials have previously defended hunting of dolphins as a traditional practice . Environmental activists say dolphin meat contains dangerously high levels of mercury .