Vladivostok's Hidden Gems: Theloderma Frogs Master the Art of Disappearance

The Primorsky Aquarium in Vladivostok is home to several rare species of Theloderma frogs, often called hole-in-the-tree frogs. These tiny amphibians, measuring just 1.5 to 4 centimetres long, are famous for their extraordinary camouflage abilities. Their unique appearance and behaviours have even made them part of an educational project for children.

Theloderma frogs possess rough, textured skin covered in strange growths that resemble bark, lichen, or bird droppings. This natural disguise allows them to vanish into their surroundings, making them nearly invisible. One specialist, Dmitry Serkov, spent two years searching for a single frog in a terrarium despite knowing it was there.

These frogs thrive in hidden spots, often found in tree hollows, rock crevices, or damp cavities. They are also skilled swimmers and can glide between branches using the webbing between their toes. Their elusive nature adds to their mystique. The Primorsky Aquarium currently houses five species: marbled, starry, Chuangxi, Vietnamese, and brick-red. Each species is kept in tanks designed to mimic their natural rainforest habitat. These environments help visitors, especially children, learn about tropical ecosystems through the 'Growing Up in the Aquarium' project. The one-on-one sessions give kids a close-up view of these fascinating creatures.

The Theloderma frogs at the Primorsky Aquarium continue to captivate visitors with their remarkable adaptations. Their role in educational programmes provides a rare opportunity for children to observe these masters of disguise up close. The aquarium’s efforts ensure both conservation and awareness of these unique amphibians.