Nifty Nudibranchs
Although some of them are no bigger than half the size of your thumb, they are one of the most vibrant creatures of the ocean! Nudibranchs or nudibranchia is a member of the mollusk family. Every type of nudibranch species is unique in a different- and sometimes crazy – way. Whether that is poisonous or talkative, maybe even solar powered! The most common nudibranchs out of 3,000 species are...
The Chromodoris Elisabethina:

This type of nudibranch is found in the tropical western Pacific and perhaps into the Indian Ocean. They are also one of the few nudibranchs that eat sponge! The Phyllidiella lizae:

Most of these guys (they are actually both genders) only grow up to 1.5cm! That’s smaller than half your pinky finger.
Now, last but not least the Vayssierea caledonica
This species of nudibranch is one I’ve seen, but unfortunately the photo that we took of this one was, along with my mother, submerged under a huge wave. Make sure you stay safe while exploring rock pools! It turns out that although it is a common species still very little is known about it.
Diet
The carnivorous species of the nudibranchs diet consists of:*sponges, coral, anemones, hydroids, barnacles, fish eggs, sea slugs, and other nudibranchs. While the herbivores eat mostly seaweed and algae. Nudibranchs are extremely picky with their food. They will only eat the food that is the same colour as them! The chromodoris elisabethina would only eat yellow and blue sponge.
*Sponges are actually living creatures!
Guess Time
I took the photo below at Long Reef, but don’t know what type of nudibranch it is. Leave a comment to tell me what it is!Fun Facts!
- All nudibranchs have one foot underneath them.
- Some nudibranchs are solar powered! They get algae and store it inside them, where that algae gets light using photosynthesis so the nudibranch can use it.
- Not all nudibranchs but some are toxic and others pretend to be use bright and vibrant colours.
- At least two types of nudibranch species can make sounds that humans can actually hear! It sounds like wire is tapping a jar, but scientists have not yet confirmed what it is used for.
- Nudibranchs have very poor vision. They can only see light and dark, but use their rhinophores (on top of the head) and oral tentacles (near the mouth) to sense what is around them.


