Before trees, dinosaurs, or even fungi, jellyfish ruled the Earth. Today, these mesmerizing creatures—some glowing with bioluminescence— continue to captivate us beneath the waves.

Inspired by their ethereal beauty, PLUS and Sailor present their 8th collaboration: the Professional Gear Slim “Jellyfish.” Its translucent navy and purple resin body and cap evoke the interplay of shadow and light deep under the sea. The pen’s sleek silhouette features an intricate jellyfish design, gracefully swimming across the shimmering surface.

To complete this enchanting creation, the set includes a 20ml bottle of “Deep Blue” water-based ink, mirroring the cool depths of the ocean and enhancing every stroke with rich, fluid color.

Sailor's Pro Gear Slim fountain pen is a comfortable mid-sized pen, small enough to fit in a pocket but long enough for comfortable everyday use. It's got a classic shape with a flat-top cap and a round barrel and grip, and comes with a converter and ink cartridges to get you started. Sailor makes their gold nibs in-house, and they're known for being exceptionally precise, with a unique feedback sensation. (Note that Sailor nibs run on the fine side, like other Japanese fountain pen nibs.)

Pen Details

• Extra Fine or Medium Fine Nib
• 21k Gold Nib coated in rhodium for smooth writing
• Pen body is made of durable PMMA resin
• Fittings in rhodium-plated trim
• Capped length: 4.9"
• Posted length: 5.6"
• Set includes ink converter and a 20ml bottle of “Deep Blue” water-based ink
• Shop Sailor fountain pens and inks here:
• Made in Japan
• MSRP $425 | Everyday discount 20% off

The first company in Japan to make fountain pens, Sailor has a long history of producing finely crafted writing instruments. Their pens are loved for their precise nibs and their colorful designs.