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  1. #1
    Senior Member solowma's Avatar
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    Jan 2007
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    Arrow crab owners

    About three weeks ago I picked up a arrow crab. I just love the looks of these "daddy long leg" creature. I have read up on them and finally decided to buy one.
    Well, what a enjoyment I get out of him. He can climb over everything and anything and protects his area of the tank. Unfortunately about a week ago I came home to see him munching away on one of my fire shrimp
    I put my hands up in the air and said oh well.
    I recently bought some more rock for the tank and I am up to 80 lbs now. This was on thursday and I saw the arrow crab on friday walking around. Since then, I haven't seen him. I can't find legs or body.
    My question is, do these crabs like to hide? It doesn't seem that he was shy before.
    Second, could the new rock have effected just him and nothing else in the tank?
    Third, with my setup, it seemed that it was ok to have this species. Can you see anything wrong in my setup(see my sig)?
    The only thing I think that could have killed him is my red hermit crab. He is as big or even bigger than one of my snails.
    150 (reef) 56 (FOWLR)
    75 gal sump 25 gal refuge
    300lbs CaribSea Aragonite Reef Sand
    280 lbs of Assorted rock
    Tunze 9010 skimmer, Current USA 48" Fixture
    1 cleaner shrimp, pistol shrimp
    50 blue legged hermit, 15 nausaurus/astrea snails
    Yellow tang, 2 clowns, 1 blue chromis, 1 yellow watchman 1 corral beauty
    Colt coral, Frogspawn, Bubble, Donut coral, Mushrooms,Starburst green, Green and orange polyps an Umbrella coral, Purple Long Tentacle Anemone.

  2. #2
    Former Moderator a4twenty's Avatar
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    was the rock cured? how did you transport it?
    `

    120S RR tank with 60G basement sump / fuge

    Return Pump: Little Giant 4-MDQX SC
    Water Movement: MP40W, Seio 1500, (2) Hydor K4's
    Lighting: 400W SE MH with 10K Venture
    Skimmer: Euro-Reef RS250 with gate valve
    Other: RODI, RDSB, PO4/AC reactor


    My Gallery

  3. #3
    Moderator mike536's Avatar
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    I was going to ask the same thing. Other than getting sucked into all the flow you have in there. Think thats a possibility? My God thats alot of flow!!! Bet it looks good thou.
    Cheers,
    Mike Philpott

  4. #4
    Senior Member solowma's Avatar
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    All the rock was cured. One piece from La Niche in gatineau and another 11 lbs from marine scape. Very good rock.
    For the flow, I have two of the 1200 and the 900 on timer every 1.5 minutes. I used to have them on more but I cut down the flow and everyone is happier now. So running at all times is the fluval, 1200 and then one of the following mentioned above.
    150 (reef) 56 (FOWLR)
    75 gal sump 25 gal refuge
    300lbs CaribSea Aragonite Reef Sand
    280 lbs of Assorted rock
    Tunze 9010 skimmer, Current USA 48" Fixture
    1 cleaner shrimp, pistol shrimp
    50 blue legged hermit, 15 nausaurus/astrea snails
    Yellow tang, 2 clowns, 1 blue chromis, 1 yellow watchman 1 corral beauty
    Colt coral, Frogspawn, Bubble, Donut coral, Mushrooms,Starburst green, Green and orange polyps an Umbrella coral, Purple Long Tentacle Anemone.

  5. #5
    Senior Member yellowtang's Avatar
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    Feb 2004
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    242

    Arrow crab

    I also had an arrow crab few months ago,I managed to keep him for few months to say the least....I loved the way he was and how he walked abouts the tank.......But he perished, what killed him I suspect was my water temp,
    it climbed up to almost 84F a day I went away.....
    my par were quite good,but found him floating abouts.........
    I would love to get some more,this time I know this guys are very delicate
    with water temp,So I found....also are quite territorial with other
    crustaceans in the tanks...specially any other shrimps one might have.

  6. #6
    Senior Member solowma's Avatar
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    Jan 2007
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    well I got out the flash light tonight and found two legs from the arrow crab
    This sucks.... I don't know what caused it.

    Now I just started the flashlight at night thing and I can see hundreds of these little, well they look like little white bugs running in and out of the rock and coral. The look almost like little millepeeds (spelling error)
    I have tons of baby snails and one, slug looking creature which I think is a snail without its shell.
    The flashlight technique is neat. As for these little, I will call them bugs with little legs and antenae, what are they. They are way to small to take a picture and I think I described them the best I could
    Thanx for the help
    150 (reef) 56 (FOWLR)
    75 gal sump 25 gal refuge
    300lbs CaribSea Aragonite Reef Sand
    280 lbs of Assorted rock
    Tunze 9010 skimmer, Current USA 48" Fixture
    1 cleaner shrimp, pistol shrimp
    50 blue legged hermit, 15 nausaurus/astrea snails
    Yellow tang, 2 clowns, 1 blue chromis, 1 yellow watchman 1 corral beauty
    Colt coral, Frogspawn, Bubble, Donut coral, Mushrooms,Starburst green, Green and orange polyps an Umbrella coral, Purple Long Tentacle Anemone.

  7. #7
    Former Moderator a4twenty's Avatar
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    Nov 2006
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    2,819
    sorry to hear about your crab ( does anyone know if arrows molt? )

    the little white bugs are pods ( copepod, isopod, amphipod ) and are a free food source


    link to a google picture search

    http://images.google.ca/images?svnum...=Search+Images
    `

    120S RR tank with 60G basement sump / fuge

    Return Pump: Little Giant 4-MDQX SC
    Water Movement: MP40W, Seio 1500, (2) Hydor K4's
    Lighting: 400W SE MH with 10K Venture
    Skimmer: Euro-Reef RS250 with gate valve
    Other: RODI, RDSB, PO4/AC reactor


    My Gallery

  8. #8
    Moderator ShipWreck's Avatar
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    Oct 2004
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    1,213
    Quote Originally Posted by a4twenty View Post
    does anyone know if arrows molt?
    All animals with an exoskeloton molt, it is the only way they can grow.

    Quote Originally Posted by solowma
    slug looking creature which I think is a snail without its shell
    That slug looking creature without a shell is most likely a stomatella snail.


    Now with your liverock addition have you lost any other creatures? "Cured rock" has many different meanings to different stores. Did you measure you water parameters after adding the rock to make sure there was no spikes?

    Also, it is possible that there was also a hitchhiker living in the rock (mantis, evil crab, euchnid worm,etc) that has done in the crab.
    Rob
    -----
    Upgrade in the works! Keep looking for an update.


  9. #9
    Senior Member solowma's Avatar
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    I have tested all my parameters and the readings were the same as before. All my parameters are in safe zones. The rock is cured and I haven't seen any new additions creeping around the rock.
    The legs I found were full legs and not molted skin. I don't know what took him out. I think I will wait another few months and see how the tank does or if any unwanted creatures are in there before buying another arrow crab.
    I really like these creatures and it was such a nice addition to the tank to look at.
    150 (reef) 56 (FOWLR)
    75 gal sump 25 gal refuge
    300lbs CaribSea Aragonite Reef Sand
    280 lbs of Assorted rock
    Tunze 9010 skimmer, Current USA 48" Fixture
    1 cleaner shrimp, pistol shrimp
    50 blue legged hermit, 15 nausaurus/astrea snails
    Yellow tang, 2 clowns, 1 blue chromis, 1 yellow watchman 1 corral beauty
    Colt coral, Frogspawn, Bubble, Donut coral, Mushrooms,Starburst green, Green and orange polyps an Umbrella coral, Purple Long Tentacle Anemone.

  10. #10
    Senior Member solowma's Avatar
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    Jan 2007
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    Now with your liverock addition have you lost any other creatures?


    No I have not lost anything else. With the addition of rock and change of flow, everything is so bright and colourful and even my clowns are now hosting in my starburst. I am starting to sum it up to being a bad crab.
    150 (reef) 56 (FOWLR)
    75 gal sump 25 gal refuge
    300lbs CaribSea Aragonite Reef Sand
    280 lbs of Assorted rock
    Tunze 9010 skimmer, Current USA 48" Fixture
    1 cleaner shrimp, pistol shrimp
    50 blue legged hermit, 15 nausaurus/astrea snails
    Yellow tang, 2 clowns, 1 blue chromis, 1 yellow watchman 1 corral beauty
    Colt coral, Frogspawn, Bubble, Donut coral, Mushrooms,Starburst green, Green and orange polyps an Umbrella coral, Purple Long Tentacle Anemone.

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