ying yang
2500 Club Member
Asterina star fish maybe?
They self propagate by losing a leg and part the oral mouth i believe then 1 becomes 2 then they grow their legs back and do same again.
Just a guess
What is that!! A R2R guide to common new tank hitchhikers.
- Thread starter Crabs McJones
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They self propagate by losing a leg and part the oral mouth i believe then 1 becomes 2 then they grow their legs back and do same again.
Just a guess
+1 Asterina.
If you do a search you will find people that will tell you to take them out and burn them and others that say they don't do anything.
My personal experience = they weren't detrimental at all to any of my corals and I just considered them part of my tank. But eventually the population exploded and started to get into my pumps, overflow, etc. So I got a Harlequin shrimp. Now I actually try to buy them to feed the shrimp
ying yang
2500 Club Member
Im not well enough versed on these guys but what ive read is the whiter ones generally better than the greyer/darker ones or something like this.
What i would be doing is looking if they grazing on rocks or grazing on corals and doing some research then make decision to keep or remove, like boachv said above some keep them and some say there a pest
What i would be doing is looking if they grazing on rocks or grazing on corals and doing some research then make decision to keep or remove, like boachv said above some keep them and some say there a pest
Tman007
Super Noob
This thread is a very helpful resource!
But something popped up in my quarantine tank that I don't see mentioned in any threads...
I've had this florida cerith snail for about three weeks now, and it already had a couple of oddities from the start -- a worm / feather duster and a partial shell fragment attached to his back. (You can ignore the ricordea frag behind him and the purple rock piece on the left.) I'm not worried about those, but the three white blobs that are growing on his back are new. Do those white blobs / bubbles look familiar to anyone, and are they a concern? Any expert insights are much appreciated!
But something popped up in my quarantine tank that I don't see mentioned in any threads...
I've had this florida cerith snail for about three weeks now, and it already had a couple of oddities from the start -- a worm / feather duster and a partial shell fragment attached to his back. (You can ignore the ricordea frag behind him and the purple rock piece on the left.) I'm not worried about those, but the three white blobs that are growing on his back are new. Do those white blobs / bubbles look familiar to anyone, and are they a concern? Any expert insights are much appreciated!
oldreefer66
New Member
I'm puzzled by a small worm I found in my coral quarantine tank (caught him in some algae I was removing). Here's a short video of the worm (he's not much over a quarter of an inch long). Doesn't look like the typically bristle worm to me. Anyone have any ideas what it is and if it is reef safe?
oldreefer66
New Member
Thanks for the ID. Do you know whether they irritate human skin? Would you recommend them in a display tank?
numbnuts70
New Member
rusty hannon
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Very awesome thread, thank you very much. We just recently received a great hitchhiker n a basket star. Very small guy but can watch this guy eat thru a magnifier for a long while. I'm sure wife put him on my build thread, along w our mantis shrimp hitchhiker I caught w a 20 oz. coke bottle before he got big enough to do harm. Was helped here on R2R by many new reef friends. Out on the bobbit worm too. The 4 footer on here still haunts my dreams. Great job again!
WheatToast
2500 Club Member
Looks like a small abalone (notice the holes?). They eat algae (including macroalgae).
https://m.liveaquaria.com/product/561/?pcatid=561
v3v3
Community Member
I dont know if they irritate human skin. I have them in my tank and are reef safe.
oldreefer66
New Member
Got you. Thanks again for the help!
GuilhermeLba
Active Member
So Guys, I noticed this lil guy, at 1st thought its was an aiptasia, but Im not so sure, it can a hydroid as well or another thing. The pictures are aweful, he is just too tiny and transparent. But looks like a mini lil flower. What is it? Is it bad? How do I get rid of? If u aim right at the center of the picture u will see. Help me!
LALA123196
New Member
Thank you! This is a really great post! Maybe you might be able to ID these guys???One of the greatest things about starting a reef tank is getting your live rock in and admiring all the diversity within it. The rock comes to life different creatures. This is a guide that I, along with a very well known critter identifier @KJ , have put together for the new reefer on what these hitchhikers are and whether they're a keeper or to pull them out.
Bristleworm -
Very common good hitchhiker. The jury is out on whether they're beneficial or not. Most consider them a vital part of your clean up crew. The hide within your live rock, coming out to pick up scraps of food and other detritus. Their numbers can become overwhelming based off how much food is available in the tank. If you overfeed, and they have access to an abundance of food, their numbers will increase dramatically. Be careful not to touch as the bristles on the sides of their bodies can be very irritating and cause an allergic reaction in some.
Fireworm -
Bad hitchhiker. Similar to the bristle worm, however if stung by the bristles on this little guy, its 10 times worse. DO NOT TOUCH UNDER ANY CIRCUMSTANCES! If found it is best to remove with a trap.
Pineapple Sponges -
Very common good hitchhiker. These little guys are a type of sponge. They are most commonly found in overflows and in high flow areas of the sump. However, they can sometimes bee seen in shaded areas of your rockwork.
Asterina Starfish -
Another common neutral hitchhiker. Jury is out on these guys as to good or bad. Some people love them, some hate them. They've been rumored to munch on coralline algae. They are also known to multiply very rapidly. Manual removal when seen is best to control their numbers.
Aiptasia -
Bad hitchhiker. This is a type of anemone that multiplies very quickly, and stings and kills anything that gets near it. Depended on how many you have, they're best removed by manually scraping them off the rock, and then using epoxy/superglue/kalk paste over where they were to prevent them coming back. A few predators that you can get for them include the peppermint shrimp, berghia nudibranch, and with a large enough tank, copperband butterflyfish.
Majano -
Bad Hitchhiker. This is another pest anemone that multiplies quickly and stings anything near it. Best removed by manual scraping off and super glue/epoxy/kalk past over its spot. Peppermint shrimp will reportedly consume them as well.
Vermedit Snail -
Very common neutral hitchhiker. They are generally harmless, but can multiply quickly based off nutrients in the tank, and can irritate corals. Manual removal or starving them out by putting a dab of superglue on the end of the tube is best to keep their numbers in check, as well as nutrient control.
Spirorbid Worm -
Very common neutral hitchhiker. These guys are most commonly found in overflows, and high flow areas of your sump. Can multiply very quickly and have been rumored to disrupt equipment such as pumps. Nutrient control keeps their numbers in check.
Ball Anemone -
Common neutral hitchhiker. They are found in shaded areas of live rock, and tend to not bother anything and numbers are kept in check with nutrient control. Are removed by the same means as the aiptasia and majano.
Stomatella Snail -
Very good hitchhiker. These guys are a great clean up crew member. They can be very elusive and most commonly found after lights out and are very fast moving. They feed off different algae in the tank.
Copepod/Isopod/Amphipod -
Very good hitchhikers. Often referred to as simply "pods" These little guys live within your rock work and make great food for your fish and corals. They can be the primary diet of certain mandarins.
Spaghetti Worm -
Good hitchhiker. Commonly found in the sand bed or live rock. They extend out multiple tentacles to catch floating detritus. Good member of your clean up crew.
Hydroids -
Bad hitchhikers. Good news is that they don't tend to live very long and die off on their own as the tank progresses.
Digitate Hydroids
Bad hitchiker- irritates nearby corals
Sponges -
Good hitchhiker. Very common filter feeders. Found in shaded areas of live rock
Serpent And Brittle Starfish -
Good hitchhikers. Are most commonly found by the arms extending out from cracks and holes in rock work. Feed off leftover food and detritus in the tank.
Bobbit Worm -
Very bad hitchhiker. These guys can grow to be very large and can kill fish. Most common means of removal is to remove the entire rock where the worm is housed. Be careful of the pincer teeth at the head of the worm.
Tunicate -
Good hitchhiker. Harmless filter feeder. At first glance looks like a sponge, except it pulses as it takes in and expels water, and reacts to touching it.
Limpet -
Good hitchhiker. Consumes algae. Don't seem to bother anything.
Fleshy Limpet
Neutral hitchiker. Algae grazer, but have been rumored to bother corals.
Slipper Limpet - Neutral hitchiker. Commonly attached to other snail shells. Don't cause any harm to the Snail or other tank inhabitants
Elephant Slug
Good hitchhiker. Algae grazer.
Chiton -
Good hitchhiker. Consumes algae. Does not appear to bother anything.
Peanut Worm -
Good hitchhiker. Lives in live rock and feeds off of extra food and detritus.
Gorilla Crab -
Bad hitchhiker. Can be found in live rock cracks, caves and holes. They are predatory and will hunt your shrimp and inverts. They can also grow rather large.
Benthic Ctenophores -
Been seeing this one pop up more and more lately, so I figured why not add them to the list.
They are a neutral hitchhiker. They mainly filter feed on zooplankton and small particulates in the water. Most commonly referred to as comb jellys.
Red Planaria Flatworm -
Bad Hitchiker. While they don't consume any coral, they can grow in numbers to the point where they smother coral. Caution should be taken as when these die off they release toxins that can wipe out a tank quickly.
Ghost Flatworm -
Neutral hitchiker. Doesn't harm anything. But does consume pods
Acoel Flatworm -
Neutral Hitchiker. Doesn't harm anything, however can grow greatly in numbers quickly
Polyclad Flatworm -
Bad Hitchhiker. Predatory towards clams and coral depended on subspecies.
Pumpkin Flatworm (Waminoa Sp)
Bad Hitchiker. Predatory. Can smother and kill LPS corals.
Acropora Eating Flatworm -
Bad Hitchiker. See name
I did not cover Nudibranch or snails in this thread as there are far to many variations to cover. If you have an unknown, please create a thread or post it in this thread and we'll try our best to ID it for you. If you have any additions to the list please PM me and I'll review it and add to the list.
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