NUDI GILL PIN-UP: Halgerda batangas

Happy New Year everyone! I know, I know, maybe it’s not so new anymore since it is already January 29th. I can’t believe how fast this month flew by. But, never fear, there’s still time to oooh and awwww over this little cutie nudi from the Tropical Western Pacific Ocean. Specifically found in many locations including  Indonesia, Philippines, Solomon Islands, Mabul, New Britain, the Davao Gulf, Malaysia, Papua New Guinea, Sulawesi, Great Barrier Reef and Taiwan. Wow! This little one really gets around.

Halgerda batangas

Alexander R. Jenner, CC BY-SA 3.0, via Wikimedia Commons

Check out the line work on this beauty! This photo shows Halgerda batangas hanging upside down. See those bumpy orange spots on the nudribranch’s body? Those have a special name that I love.


Alexander R. Jenner, CC BY-SA 3.0, via Wikimedia Commons

In anatomy, a tubercle is any round nodule, small eminence, or warty outgrowth found on external or internal organs of a plant or an animal. I love learning new words.

Three cheers for TUBERCLES!

Want to learn another cool word? Those thin orange lines on the nudibranch’s body make up a specific pattern that is seen in other places in nature. Do you know what it is? This giraffe has the same kind of pattern in its fur.

Relative of Brandt Luke Zorn, most likely his father., CC BY-SA 2.0, via Wikimedia Commons





The polygonal shapes resemble a network of markings.

Here’s another example in nature. This python also has this special word in it’s name:








Leaves have these special patterns too. See those tiny veins in the leaf? They supply the leaf with nutrients.

Jon Sullivan (PD

This pattern is a

Reticulate Pattern

Reticulated Giraffe

Reticulated Python

Reticulate Venation

By the way, if you like educational wormholes as much as I do, here’s a link to a fascinating webpage I stumbled upon all about leaf structures. Go geek out and get the skinny on a whole new world of words.

BOTANY BASICS: Understanding Leaves

I hope you enjoyed meeting Halgerda batangas and learning a few fun new words. Stay tuned for February’s Special Valentine NUDI GILL Pin-Up.

Geek on!


NOW Available for pre-order!

Bonnie Kelso writes and illustrates books for children and adults that encourage individualism and brave self-expression. She facilitates art workshops for her local community and beyond. Her debut picture book, NUDI GILL, releases in March, 2023. A lover of nature and travel, she often wanders about outside with her family whenever an excellent opportunity to do so presents itself.

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