Back Story
I was introduced to this client through a mutual friend. The company is a geologic consulting firm in oil and gas industry with specific expertise in terrain analysis which they in turn provide to drilling companies.
The name 'Tethys' made reference to the Tethys Ocean which existed during the Mesozoic era. This in turn, led me to what sort of logo mark the client wanted: a placoderm, specifically a Dunkleosteus, which is a kind of prehistoric predator fish.