Hundreds of hippos cram together as they wallow in a cooling mud bath. The huge animals are tightly packed as they yawn, relax and roll around in the murky water which stops them overheating and protects them from sunburn. The pictures were captured by amateur photographer Anne-Marie Vermaat while she was on safari in Tanzania. SEE OUR COPY FOR DETAILS. Please byline: Anne-Marie Vermaat/Solent News ? Anne-Marie Vermaat/Solent News & Photo Agency UK +44 (0) 2380 458800