While shorter appendages are generally solid, larger protrusions tend to be hollow, with some of the largest displaying a spongy internal structure.

The first possible identification was that of a narwhal, as they have a large protrusion from the head, but after further investigation, that identification was not confirmed.

Many species have large protrusions from their thorax and head such as the Rhinoceros beetle, which can be used to defended themselves from predators.

There are six large protrusions from the rectangular base which house air ducts, stairs and elevators.

However, there was something odd about the wings, and large protrusions on the underside.

One of the largest wrasses, the Asian sheepshead wrasse is an extraordinary pinkish-grey fish with large, swelling-like protrusions on the 'forehead' and 'chin'.

One of them has something strange wrapped around his forehead, two large protrusions like antennas jetting several inches out from his head.

Each had dusky skin, with a large, two-lobed protrusion at the rear of the skull, mottled similar to Trill markings.

This may be because of its geographical location, forming a large protrusion into the county.

Many of the larger protrusions were connected to others by great flying bridges and walkways.