It's not uncommon to find water and gases trapped within amber. The above photo shows small inclusions known as "enhydros" , containing gas bubbles floating in ancient water drops, in a specimen of Baltic amber. When the specimen is tilted under the microscope, the gas bubble moves ( note arrows) in the aqueous inclusion. Approximate mag x 25.

Some insects, especially termites, can produce gas as they decompose within amber. Microorganisms that dwelled in the gut of the ancient termite in Dominican amber shown here have produced so much methane gas so as to distort the insect beyond recognition, forming a large aggregate gas bubble. Approximate mag x 5.