A recent advance in the investigation of internal gas hydrate structure and in small scale quantification is based on a combination of a new coring device and computerized x-ray tomography (CT). This approach has been chosen because gas hydrate is only stable within a special (low) temperature and (high) pressure field. A MultiAutoclaveCorer, developed by the Technical University of Berlin, is in principle similar to a piston corer and has the size of a multiple corer. During the deployments on Hydrate Ridge, two pressure vessels filled with seafloor samples could be recovered. They were CT-investigated after the cruise in a medical clinic close to San Francisco. As a result, a 3-D-dataset of the cores is available which allows to quantify the components’ gas hydrate, sediment and free gas and also shows the distribution and orientation of the gas bubbles. One of the pressure vessels showed a distinct gas hydrate horizon where the gas hydrate content reached close to 50 vol%. Within this horizon there was a free gas content of 2.4 vol%. The preferential bubble orientation, compared to free gas in soft marine sediments, is horizontal, not vertical, which is an indicator for the mechanism of gas hydrate formation.