Issued July 16, 2019 by Hong Kong Post, this unique souvenir sheet highlights the fascinating underwater world of Hong Kong. Sc# 2015 - Threadfin Butterfly Fish & Yellow Box Fish, Sc# 2016 - Papuan Jellyfish & Hong Kong Pufferfish, Sc# 2017 - Chinese White Dolphin & Green Turtle, Sc# 2018 - Yellowtail Clownfish, Sc# 2019 - Spotted Seahorse & Blotched Fantail Ray and Sc# 2020 - Sea Slug & Pink Coral. Unique fish-shaped perforation on lateral sides.