Sea pens are colonial marine cnidarians belonging to the order Pennatulacea. The order Pennatulacea, commonly known as sea pens, are colony-forming benthos...

A pen is a common writing instrument that applies ink to a surface, usually paper, for writing or drawing. Early pens such as reed pens, quill pens, dip...

The slender sea pen (Virgularia mirabilis) is a species of sea pen in the family Virgulariidae, occurring throughout the Mediterranean and Western Europe...

The feathery sea pen (Virgularia schultzei) is a species of sea pen in the family Virgulariidae. Feathery sea pens stand upright in the sand like the...

Ptilosarcus gurneyi, the orange sea pen or fleshy sea pen, is a species of sea pen in the family Pennatulidae. It is native to the northeastern Pacific...

sea pen in the family Echinoptilidae. It is monotypic with a single species, Actinoptilum molle, commonly known as the radial sea pen or purple sea pen...

into four main groups: the almost wholly sessile Anthozoa (sea anemones, corals, sea pens); swimming Scyphozoa (jellyfish); Cubozoa (box jellies); and...

with simple articulation, e.g. Dickinsonia and Spriggina), Petalonamae (sea pen-like animals, e.g. Charnia), Aspidella (radial-shaped animals, e.g. Cyclomedusa)...

Renilla is a genus of sea pen. It is the only genus within the monotypic family Renillidae. The following species are recognized: Renilla amethystina...

of continued research, and this has discredited the sea pen hypothesis. In contrast to sea pens, which grow by basal insertion, Charnia grew by the apical...