Hydrocephalus is a condition where cerebrospinal fluid (CSF) is accumulating within the brain. This condition typically manifests with increased pressure inside the skull. Hydrocephalus can be categorized as a birth defect or to be acquired later in life. Four types of hydrocephalus have been described in the literature: communicating, non-communicating, normal pressure and ex-vacuo. This condition can be treated surgically with the placement of a shunt system.

In the veterinary field, hydrocephalus is most commonly seen in dogs and cats and almost never in marine mammals. The team of veterinary surgeons at the Tufts University (Massachusetts, US) had the opportunity to perform a one-of-a-kind brain surgery on a Northern fur seal named Ziggy Star.  

The female adult seal was first found stranded on the beaches in North California 4 years ago and since then her home was the Mystic Aquarium (Connecticut, US).

Read Ziggy’s whole story and more about her condition and her surgery on the following link:
https://goo.gl/Tq4iVe