Devil In Disguise – The Most Toxic Sea urchin

Devil In Disguise – The Most Toxic Sea urchin

The Most Toxic Sea Urchin Resides In Thai Waters

The most toxic sea urchin is not the fire urchin as you might think. That would make sense, a name that would stop anybody with a functional brain from touching it. So what have scientists named the most toxic urchin? They’ve gone for flower urchin – thanks. There’s ample space for another more suitable word. Hell, agony or stinging flower urchin would have all given us a hint to stay well away.

I’m Alright Jack

The scientists have certainly looked after themselves. The scientific name (toxopneustes) means toxic foot so anybody in the scientific community or who is verse in latin will know to give it a wide berth. It’s just the remaining 99.9% of the earths population who could get fooled by the cutesy name.

You can do it – scorpionfish, stingfish, waspfish, demon stinger and fire coral all let us know to avoid contact. I’m not saying every dangerous animal should have a deathly moniker, with most you can tell by just looking. You wouldn’t pat a saltwater crocodile on the head and not expect to lose a limb or four. Just help us out the common folk with the more unremarkable looking creatures. Anyway, the animal itself…

More Subterfuge

It’s a very beautiful urchin, covered in small colourful triangle and circular appendages. These are the ‘flowers’ from whence it gets its name. It does have spines but they’re not as prominent as on most urchins. Surprisingly the spines aren’t where it deals out the pain from. The small flower like appendages are what make it the most toxic sea urchin. Each one has a tiny hook that houses the venom. They’re strong enough to pierce human skin and can detach to give you a nice little memento.

mushroom shaped toxic flowers on the most toxic sea urchin

mushroom shaped toxic flowers on the most toxic sea urchin

How Toxic is It?

Well the good news is that there’s been no substantiated deaths although it has been a suspect in some drownings. The symptoms are said to include: dizzyness, paralysis of lips, tongue and eyelids, limb relaxation, respiration difficulty and severe pain. A recorded instance suggested that the symptoms receded over the course of an hour but facial paralysis remained for 6 hrs.

So it looks like the venom itself is not enough to finish you. However a combination of those symptoms could cause drowning for a snorkeler or diver.

Natural Velcro

The flower urchin covers itself with debris, why we’re not sure. It’s very unlikely that it’s defensive, the flower urchin is obviously very capable of dealing with threats. It uses the the small hooks like velcro to attach the debris which possibly protect it from sunlight.

the most toxic urchin covering behaviour

the most toxic urchin covering behaviour

How Common Are Toxic Flower Urchins

Not to sure around Phuket but definitely at Racha Yai and Richelieu Rock in the Surin Islands National Park. However the covering behaviour can make them very difficult to spot and there may be more than we think. Most will not be aware of how toxic this beautiful little urchin is so it’s probably pretty much ignored.

If I get Stung By A Toxic Flower Urchin

First off you need to get to the surface as quickly as safely possible. It’s a protein based venom so the general first aid recommendation is to immerse the affected area in water as hot as you can tolerate without scalding. Remove any of the stings and seek professional medical attention.

Take a Phuket diving daytrip with Local Dive Thailand to find your devil in disguise.

Contact Us Now

By Justin Hartrey

I've been enjoying the incredible marine life in our oceans for over 25 years. 13 years ago I became a PADI professional in Phuket, hoping to introduce as many people as possible to the incredible beauty of the seas.

Having been fortunate enough to dive all over south east and especially Thailand, I enjoy sharing my diving experiences and passion on this blog.

Originally from Bristol in the UK, I swapped the frigid waters of the North Atlantic for the warm tropical seas around Thailand and can confidently say that I wouldn't go back

Posted in Rare & Peculiar Critters on .

Popular Services

local dive thailand terms and conditions

Local Dive Thailand Terms & Conditions

Local Dive Thailand (“Local Dive Thailand“) owns and operate this Website. This document governs your relationship with Local Dive Thailand and our website www.localdivethailand.com. Access to and use of this Website and the products and services available through this Website are subject to the following terms, conditions and notices. By using our services, you are agreeing to all of the Terms of Service, as may be updated by us from ti [...]

Find Out More
The West Ridge Of Phuket Diving Site Koh Bon

Koh Bon Diving – Phuket’s Manta Magnet

A two hour sail northwest from Similan Island #9 will bring you to the granite island of Koh Bon. Although a fair distance away it's still considered part of the Similan Island National Park. Easily recognisable by a circular opening in the granite wall. The majority of dives here will incorporate the west ridge. A thin granite spine of rock that starts above the surface and continues underwater to a depth of 40m. Along the ridge you'll fi [...]

Find Out More

Daily Schedules

M/V Kepsub Schedule

Jobs @ Local Dive Thailand

Local Dive Thailand is one of Phuket's fatest growing & most vibrant scuba diving operations, we are always looking for quality staff to join us, so feel free to have a look at our jobs listing page.

Job Listings

Contact LDT

Local Guides, Local Knowledge, Local Experiences

Don't trust your diving to amateurs or freshly minted dive guides, dive with local experienced experts from Local Dive Thailand. Our Scuba Diving Phuket Tours will take you to see the rarest of the rare critters, you will be amazed by the macro life our guides can find, in the secret places only they know. To put it in perspective, if you were going to climb Mount Everest you would certainly hire a local sherpa to lead the way & keep you safe. Diving is similar because there is absolutely no substitute for local experience & local knowledge, Local Dive Thailand's guides are Phuket's Sherpa's of the Andaman Sea!

Learn More About Us

Scuba Diving Phuket, Phi Phi & Thailand

When talking about Scuba Diving in Phuket, you should believe the hype, many seasons we have had Whale Sharks grace us on our regular and easy to reach dive sites and on a good day you can add Sea Horses, Sea Moths, Snake Eels, Frog Fish & Octopus to what you can see on any given dive and so much more. If we are heading to Phi Phi Island for the day, you can possibly see Hawksbill Sea Turtles and Black Tip Reef Sharks, also don't forget the King Cruiser, 84 meters of beautiful wreck and the most amazing reef nursery for fish and nudibranch. Local Dive Thailand day trip tours to these locations are not to be missed when you are scuba diving Phuket, get in touch with us and book an 'awesome' day of diving.

Book Your Day Trip

Related News From Local Dive Thailand

See why we are Thailand's leading scuba diving Phuket tour provider, stay up to date & watch out for news & special liveaboard offers!

upcycling the oceans phuket Diving Discounts & Special Offers

Help Save The Oceans And Save Money

Upcycling The Oceans is a new initiative which gives divers an opportunity to "do their bit" and save a bit of money. Use dive operators who've joined the programme such as Local Dive Thailand to reap the rewards. It has no negative impact on your enjoyment of the dive. You simply collect any plastics you see during your dive and hand it in to us - couldn't be more simple! In a nutshell the main focus is reducing and reusing ocean plas [...]

Read Full Story
Diving With The Olympus TG5 Equipment We Like

Olympus TG5 Underwater Review

Local Dive Thailand had a bit of a break from Phuket diving and took the new Olympus TG5 for a trip to Komodo. Plenty of upgrades and new features to be tried out. Should have brought the manual really... A gentle macro dive to start the trip. The macro capabilities of the TG series has always been great for a compact and still remains the same. If you're not a smartarse and read the manual you'll find out that the flash in the TG5 can [...]

Read Full Story
great deals on the junk and phinisi Diving Discounts & Special Offers

Save 25% On All Junk & Phinisi Trips 2020

Great offer for two very special boats! 25% of all remaining 2020 departures on the The Junk & Phinisi. A fantastic opportunity for Thai nationals, expats and the few who're eligible to return in the near future. Both boats will be running a few Southern Andaman trips to the Phi Phi and Racha Islands. From October the Similan and Surin islands will be open once again for diving and both boats will head to the North Andaman Sea. Souther [...]

Read Full Story

Local Dive Thailand Office In Phuket


Find Us On Google Maps