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Emerald Crab
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Emerald Crabs are excellent algae eaters, and are especially useful in combating bubble algae. They have a lumpy, green carapace, furry legs, and claws flattened at the tips to harvest food. Most commonly they are found in...
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Searched Emerald Crab in Reviews
Simply Amazing
| Comments |
These little guys are terrific. They will munch down even the longest algae strands and are very cool to watch too.
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| Liked about it |
Inexpensive. Fun to watch. Efficient algae control machine.
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| Didn't like |
Not too pretty of a crab but great at what he does.
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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A bit expensive and don't last long
| Comments |
I've had probably a dozen Emerald Crabs over the years. They're a nice color and do a good job with Bubble Algae. Without them, the Bubble Algae would probably take over my tank. They are relatively inactive and only come out at night. During the day, you might seem them hiding under a rock or in a crevice. I'm not aware of them injuring or damaging any of the other tank mates.
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| Liked about it |
Helped to keep the Bubble Algae in my tank under control. I've never found anything else that works as good. They also have a nice neon green color to their shells.
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| Didn't like |
They are pricy, about $8 for a little crab. In my 29g aquarium I need at least 2 to be effective. They don't last long. The longest I've had one survive is about a year.
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| Overall rating: |
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3.5 |
| Overall satisfaction: |
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3.0 |
| Would consider buying it again: |
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4.0 |
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Emerald Crab
| Comments |
The Emerald Crab is a great addition to ones aquarium as they are primarily algae eater and do a great job controlling hair algae. They are however optimistic omnivore and in my opinion they may posse a threat to any small fish if underfeed.
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| Liked about it |
Great addition to anyone’s clean up crew and are low maintenance
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| Didn't like |
Emerald Crabs tend to be nocturnal
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Terrorized my SPS.
| Comments |
This creature was extremely easy to take care of, and was very shy. It isn't very active, it liked to hide and or sit in a single spot for a long period of time. I will never keep emerald crabs and corals together ever again.
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| Liked about it |
The crab was a cool shade of green and had hairy legs. xD
The theory that they may eat bubble algae, hit or miss.
Small in size.
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| Didn't like |
Terrorized my Frogspawn until it died...
Would grab any source of food, pull it to hte back of the tank under the rock structure, eat as much as it wanted, and just leave it there out of reach to rot in my tank. >:(
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| Overall rating: |
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2.0 |
| Overall satisfaction: |
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3.0 |
| Would consider buying it again: |
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1.0 |
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Really good crab
| Comments |
These crabs are great for reef tanks IMO. They pick at all kinds of algae and they do it a lot. They even eat Brown Wafer Algae which is rare, because only a few creatures will actually eat that stuff. They do a great job at algae control and they get all the extra food the fish miss.
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| Liked about it |
I like the color and the way they look. They are not very expensive. And they are the perfect size for reef tanks.
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| Didn't like |
They tend to come out mostly at night, but they do come out during the day sometimes.
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Thoughts on Emerald Crabs.
| Comments |
These are very easy to take care of. The green color and structure of its body is awesome.
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| Liked about it |
Great addition to any marine tank. The reason stating that is due the scavenging they do is awesome. They will shift the top level of the sand. Eat left overs from meaty items, and pellets. Mine even eats hair algae from time to time.
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| Didn't like |
Emeralds Can be shy some times. But overall no complaints
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Crabs
| Comments |
It is an easy crab to keep and he also helps to keep the reef clean
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| Liked about it |
1.cleans my reef
2.small
3.easy to keep
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| Didn't like |
1.some times he picks at corals
2.hides all day
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Can be a good reef addition with caution
| Comments |
The emerald mithrax crab (Mithrax sculptus) is a popular addition to reef aquariums for their scavenging traits as well as their history of helping to control bubble algae (Valonia sp.). These crabs have great personality when viewed, however tend to be nocturnal and thus hide during the day. Care must be taken when considering addition of these creatures in a reef aquarium as they are omnivores and are, therefore, opportunistic feeders that may turn to corals, other invertebrates, or small fish for a food source. However, when well fed, most Emerald Mithrax Crabs are very tolerant of their tankmates and highly compatible in reef environments.
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| Liked about it |
Good for bubble algae control
Good scavengers
Tend to not bother other tank mates and corals
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| Didn't like |
They are a crab and thus cannot be fully trusted to be completely "reef safe".
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| Overall rating: |
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4.0 |
| Overall satisfaction: |
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4.0 |
| Would consider buying it again: |
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4.0 |
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Work Horse
| Comments |
I like keeping two in my tank when I can. They have never shown aggression and they are easy to care for. They always seem to be looking for something to eat. The smaller crabs I believe are better.
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| Liked about it |
Always picking at the rocks cleaning them of algae. Small and non threatening. Love trying to find them in the tank.
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| Didn't like |
Nothing.
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Good cleaners...
| General |
Emerald crabs are a great addition to a clean up crew. |
| Liked about it |
Good cleaners, eat bubble algae, low maintenance.
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| Didn't like |
Can get large and knock over rock work/corals.
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Great for bubble algea!
| General |
I always keep 2-3 of these is my 125. I have never seen them harming anything but algae. They do a great job keeping the bubble algae at bay. |
| Liked about it |
Cheap
Effective on bubble algae
Fun to watch
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| Didn't like |
Nothing!
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Safer but still suspect in my tank
| General |
Probably safer than most other true crabs but I have grown to distrust all crabs. |
| Liked about it |
It did eat bubble algae and likely other algae.
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| Didn't like |
The two I have had both picked at zoanthids. Maybe there was a bit of algae on them I could not see but I gave them away.
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| Overall rating: |
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2.5 |
| Overall satisfaction: |
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3.0 |
| Would consider buying it again: |
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2.0 |
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Crab
| General |
My crab loved algae and like me was a very peaceful veggie. They are great and my kdis seemed to really like him. He died of unknown causes and I will be getting another very soon. |
| Liked about it |
Diet.
Appearance.
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| Didn't like |
He died.
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
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Love this crab!
| General |
I have never had one eat or pick on anything in any of my tanks. but have heard other people say they do, |
| Liked about it |
I like the fact that they eat unwanted algae.
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| Didn't like |
The larger ones can knock things over
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| Overall rating: |
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5.0 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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5.0 |
 By VWD
Jun 22, 2009
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Good non-hermit crab
| General |
This crab is great for controlling algae. if has done a good job on getting to the spots my snails and fish don't reach. since it stays relatively small and is primarily herbivorous it isn't a threat to its tank mates. only thing is, i don't see mine very often. |
| Liked about it |
small size
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| Didn't like |
rarely seen
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| Overall rating: |
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4.5 |
| Overall satisfaction: |
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4.0 |
| Would consider buying it again: |
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5.0 |
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awsome critter
| General |
I have seen these guys get good size and it makes them all the more interesting. They will however eat anything they can get in their claws. Be careful with small fish. |
| Liked about it |
I love how they look
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| Didn't like |
They will eat whatever they can get in their claws
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| Overall rating: |
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4.5 |
| Overall satisfaction: |
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5.0 |
| Would consider buying it again: |
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4.0 |
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internal use: spec342
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