Old World Swallowtail (Papilio machaon)
The marine iguana is an iguana located only on the Galápagos Islands that has the ability, unique among modern lizards, to live and forage in the sea, making it a marine reptile. The iguana can dive over 30 ft into the water.
category 1 kaiju
That is a fucking terrifying Sea Godzilla.
Via Spectral's Tumblr