Eunice Worm Video

TJ_Burton

New member
I have been meaning to get a video of my 'pet' Eunice worm for a long time now, but never had the opportunity for several reasons. He was elusive, disliked light, and hardly came out of his hole. About a month ago I changed his aquascape so that it was more open and vertical, and since then he has been making himself more viewable and easier to film.


A little history on Smaug (named after the dragon under the mountain)
Close to two years ago, I purchased a bunch of live rock from an LFS to start my 20 gallon reef system. I happily picked out several prime pieces of live rock, completely unaware of the hitchhiker that lurked within. After several months and a few disappearances, I finally caught my first glimpse of a skinny, 10" long worm with 5 points sticking out of it's face... knowing what a Eunice worm looks like from a previous encounter years ago, I understood I had to remove it as soon as possible.

In the process of removing the Eunice worm from my tank, I had broken it up into a pile of pieces. I threw 90% of the worm out, but its little head and tiny 1/2" section of body seemed to remain steadfast in its struggle for survival. I decided to set up a small 5 gallon tank and tossed what was left of the worm into the new tank. A few weeks later I looked into the tank and was surprised to see that a good portion of the worm had already regrown, and jumping ahead to today, he is almost 2' in length and the circumference of a sharpie!


He eats just about everything from shrimp pellets to culled guppy fry. I intend to keep him for his entire life span and am fascinated by him on a daily basis.

Without further delay, I present to you, Smaug!

Youtube:
http://youtu.be/7fukLzoyOxs

Screenshot:
CaptureOrpD.jpg
 
:lol: I love the music you chose. Very ominous.

You have lots of pods running around in there too. And some aiptasia.
 
:lol: I love the music you chose. Very ominous.

You have lots of pods running around in there too. And some aiptasia.

Ha,

Yeah, we have nicknamed his tank "The Gauntlet" because of all the unwanted pests (anemones, various algae, predatory or harmful crabs). The pods are constantly running between hazards.

The glory of having a tank with no corals or sensitive inhabitants!
 
Great video! I see you left him (her?) some food to entice visibility. And the music really fits the subject!!!! I won't sleep tonight.

:eek2:
 
HOLY @%#$&@*#$@%@!
That thing is FREAKY! It's kind of pretty, though... Emerald green and shiny.
Those are pretty 'pods... All stripy.
 
Just for fun, here is what the entire tank looks like. Not exactly what you dream of when setting up a marine tank...

IMG_3305CjPEZ.jpg


And just for contrast, here are some of the tanks I have done over the years (last is my current build)

20 from 2004
NanoTanknov82004.jpg


40 Breeder from 2009
NewBulbsFTSq7nGU.jpg


20 Gallon SPS (current tank started 2012)
IMG_3299luOG.jpg


Current 25 gal (<2 months old)
IMG_34885tQLo.jpg
 
Ooh, nice chalk bass in your current tank. And is that little orange fish a platy?
Heh, I guess that messy one is your 'ooh, it's cool but it's a pest, I'll chuck it in somewhere' tank, huh?
 
What I've never been able to figure out is that the videos you see of the large ones eating fish they seem to have really large and aggressive mouth parts. All of the ones I see in people's tanks don't seem to have them or at least they're not visible. Are they just different species or are the mouth parts retracted and not visible? How does it capture it's food? The videos in the wild seem to be ambush predators, but these guys seem different.
 
Ooh, nice chalk bass in your current tank. And is that little orange fish a platy?
Heh, I guess that messy one is your 'ooh, it's cool but it's a pest, I'll chuck it in somewhere' tank, huh?

The little orange fish is a Creamsicle Molly. I used it to help get rid of some unwanted algae. They make pretty darn good marine algae eaters. The only thing I will say is that they do not fair well in higher flow environments unless you feed them very often. They tend to get skinny fast from constantly swimming against the current.

The messy tank is exactly that! A little evil-haven for unwanted 'pest' hitchhikers.

you need to add a few lego knights with swords at the door to his lair

Hahahaha that would be golden! I may just do that!


What I've never been able to figure out is that the videos you see of the large ones eating fish they seem to have really large and aggressive mouth parts. All of the ones I see in people's tanks don't seem to have them or at least they're not visible. Are they just different species or are the mouth parts retracted and not visible? How does it capture it's food? The videos in the wild seem to be ambush predators, but these guys seem different.

Even Smaug has large hook-like jaws similar to the ones you see on the youtube videos. When the worms are not eating, the jaws are retracted and not visible. Certain species (like the ambush predators you mentioned) will lay in wait with the jaws open for an unsuspecting fish to swim by, while other species will act more like scavengers, only exposing their jaws when using them to pull in food (you can just barely make them out in Smaug's video as he ingests the pellet).

Here is a pic of the ambush type bobbit worm:

Bobbit-worma4UQV.jpg
 
The ambush type Eunice Worm are incredibly fast. I was photographing a fish traveling over the sand and it disappeared in less than second. Very, scary considering these animals get to be substantially large.

Eunice aphroditois (colloquially known as the Bobbit(t) worm after John and Lorena Bobbitt), is an aquatic predatory polychaete worm dwelling at the ocean floor. This organism buries its long body into an ocean bed composed of gravel, mud or corals, where it waits patiently for outside stimulus to reach one of its five antennae, attacking when it senses prey. Armed with sharp teeth, it is known to attack with such speeds that its prey is sometimes sliced in half. Although the worm hunts for food, it is omnivorous.

According to Luis F. Carrera-Parra and Sergio I. Salazar-Vallejo, ecologists specializing in annelid polychaetes at El Colegio de la Frontera Sur (ECOSUR) in Campeche, Mexico, the eunicid injects "...[a] narcotizing or killing toxin in their prey animal, such that it can be safely ingested — especially if they are larger than the worm — and then digested through the gut". They further state that, unlike a different family of worms, the fireworms (Amphinomidae), which have harpoon-shaped chaetae (bristles) that release a toxin that can cause severe skin irritation, E. aphroditois "do not have abundant chaetae and their chaetae are not used for defensive purposes, but for improving traction for crawling over the sediment or inside their galleries or tubes".

Little is known about the sexual habits and lifespan of this worm, but researchers hypothesize that sexual reproduction occurs at an early stage, maybe even when the worm is about 3.9 in in length; this is very early, considering that these worms can grow to sizes of nearly 9.8 ft in some cases (although most observations point to a much lower average length of 3 ft 3 in and an average of 0.98 in in diameter). A long lifespan may very well explain the size of these creatures.

Eunice aphroditois is found in warmer oceans around the world, including the Indo-Pacific and Atlantic. I have only seen them in the south Pacific.
 
A nearly 10' worm that could cut me in half before I realized it was there. That's not frightening at all.

i don't know about cutting you in half"¦but i am sure it could do a good job on an unprotected finger"¦even though they are up to 10ft long they are less then an inch around, a little thinner then a magic marker...
 
No they will not and cannot cut you in half. They are, however, venomous.

They are venomous? That I did not know..

Oh boy and this week I've been letting one live in my 10 gallon...

Are there any predators that have been reported attacking eucinids?
 
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