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Cobalt Blue Lobster
Please Note: Due to variations within species, your item may not look identical to the image provided. Approximate size range may also vary between individual specimen.
Cobalt Blue Lobster (Procambarus clarkii)
Additional locales and sizes may be available!
Product Notes:
· We cannot ship this product to Florida, Maine, Michigan or Wisconsin.

Quick Stats

Care Level Easy
Temperament Semi-aggressive
Color Form Blue
Diet Omnivore
Water Conditions 68-85° F, KH 3-10, pH 6.5-8.0
Max. Size 5"
Origin Farm Raised - USA
Family Cambaridae
Minimum Tank Size 20 gallons
What do these Quick Stats mean? Click here for more information


The Cobalt Blue Lobster is one of the most striking ornamental crayfish you'll ever see. It will add an amazing splash of brilliant blue color that's sure to draw attention to your freshwater aquarium. The coloration of this blue beauty intensifies as it matures.

Due to selective breeding, the Cobalt Blue Lobster will not lose this blue coloration, except in times of stress. The Cobalt Blue Lobster may arrive a brown coloration due to shipping stress but will eventually regain its bright blue coloration. They remain relatively small in the aquarium, only attaining a total length of five inches.

House the Cobalt Blue Lobster in an aquarium of at least 20 gallons with medium or fine grain substrate for burrowing. They are territorial towards their own kind and a larger aquarium will be needed if housing more than one lobster. To house multiple lobsters, provide at least 20 gallons per lobster and include plenty of rocks and plants as cover.

The Cobalt Blue Lobster is generally peaceful, except with its own kind. They will not typically bother fish, unless they are very small, and slow enough for the lobster to catch.

These lobsters are omnivorous, and will act as a scavenger in the aquarium, eating any food that comes to rest on the bottom. Supplement their diet with a quality sinking pellet, flake food and dried algae.

Approximate Purchase Size: 2" to 3"

Customer Testimonials

J. Smith Petaluma , CA
My Blue Lobster "Slurpee" has made a great addition to my natural looking tank. His tankmates are Platys, Tetras,and Rainbows. None are slow enough to get clipped by Slurpee. As long as your fish are healthy, they should be able to avoid the claws of this little lobster.
Jamie K Woodland Hills , CA
My blue lobster is the greatest. I love watching him eat. It's so interesting! The only thing is that they like to redecorate the aquarium by pushing over the decor and moving all the gravel to one side. Even if you clean it up, they put it back within days! But I love him!
Laura R Saugus , CA
I bought 4 of these blue lobsters. They are beautiful to look at, and fun to watch. Mine only come out in the tank when it is dark. Keep a lot of hiding places for them, as they like to wait for their prey to come to them. You should not house these with many of the community fish, like tetras, guppies, and it even ate my Singapore Flower Shrimp! They molt a few times a year, and you should leave their old shell in the tank as they will eat off of it to regain their new shell. Do not be surprised to see yours take things like rocks, and such, into his hiding place, it is normal, and actually fun to watch, as they often try to get larger items than they can actually move. I love mine, and the kids love to watch them, but be careful housing with small fish.
Eric D Raleigh , NC
Great addition to a freshwater tank, though it's best kept with larger fish. Avoid guppies, tetras, and other small fish, particularly those that might settle near the bottom, as the lobster can and will make a meal of these.
Brian Youngsville , LA
Yes, these little guys are amazing fun - but they will find their way out of your tank if there is a route to freedom. Of course you then find them in the corner walking around with dust bunnies from under the couch all over them. Mine seems to still be doing fine after this happening - we will see though.
Gloria T Wichita , KS
I love my lobster, HUMMER, but he likes to clip my fancy goldfishes tails a lot. And he likes to reorganize all my plants. He is fun to watch and I didn't know that they shed their shell - very interesting.
Gregory S Johnson City , TN
By far the neatest addition to our tank!! We have a 55 gallon tank dominated by African Cichlids, all of which were thoroughly interested in the lobster when he was introduced. A couple of pinches later, and they learned to keep their distance! The substrate in our tank is a combination of fine/moderate, and it is amazing watching the guy roll, pull, and pick up stones (some the same size as him) to remodel his home the way he sees fit. His color is also amazing. He arrived a cotton candy blue, with flecks of lavendar and bubble gum pink - a perfect contrast to the earth tones in the tank.
Shannon J Hamilton , NY
I just purchased a blue lobster a few days ago. I have been doing a lot of research on them and I have discovered that they really are "escape artists"!!!! I always feed before I leave for work in the morning and this morning, I came out and in the dark I saw something on the was Leonardo Capistrano Shikadance Jr., otherwise known as my blue lobster, he had escaped....he is still alive though thank, the moral...make sure that you cover all openings of your tank, ex: filter or heater openings because your blue lobster WILL find his way out!!!!
Cynthia H Carmi , IL
We have a 128 gallon tank and our fish are strictly Frontosas. Logan the Lobster has really been a fun addition to our cichlid family. He certainly knows how to take care of himself and has taken up residence in a large shell! These little guys are really interesting to watch!
Deborah D Kansas City , MO
My Cobalt Blue is housed with three Gouramis and a school of 7 Cardinal Tetras. He has never bothered the other fish. The only problem is that he tears up any freshwater plants that I add... even the ones attached to driftwood. I guess I have to resort to plastic. Great creature to watch.
Christopher R Brooklyn , NY
I got my Blue Lobster (Marv) and he is amazing. I keep him in a tank with one goldfish (Alvin) and at first they didn't get along. Marv was very protective of his personal bubble and didn't like when Alvin came near him. There were a few close encounters where I thought Marv was going to have a live meal but he was too slow. It took Marv about 4 days until he started to eat. I started giving him algae wafers but I never saw him eat it. The food disappeared but I think the goldfish was eating it. I found out his favorite food, chicken!! He went to town on a pinch of chicken breast. He's going to bulk up big time. I keep the Ph around 7 and the temp in the 70-75 range and he seems to be thriving, walking around and climbing like the little beast that he is. These Blue Lobsters will make a great addition to any fish tank, but just don't be surprised if any slow fish disappears over night.
Edward W Mount Rainier , MD
I purchased a Cobalt Blue Lobster three years ago and instantly fell in love. I was surprised at how often it molted but each time it's color became even more brilliant! I did, however, make the mistake and placed my Lobster in a tank with Jack Dempseys. Everything was fine until my Lobster went after the Dempsey's eggs. Needless to say, I come home one evening to see that my Dempsey has had Lobster for lunch. I'm placing an order today and it will be housed by itself in a separate tank. And yes, I still have that same Dempsey. She's alive and well.
Densie P Lakeport , CA
I absolutly love my lobster. I have him in a 30 gallon tank with various community fish including gouramis, swordtails, tetras a beta and a large pleco. When I first got him he would wave his claws at me but now he just goes about his business cleaning up and moving rocks. He took a swipe at the beta when I first got him and got a bit of his tail but they get along fine now and the betas tail has grown back. He also went after the pleco a couple times too but the other day I saw him and he just walked right over the pleco's tail cleaning as he went. He has tried to hunt a couple of the swordtails but they usually stay out of his way. He adjusted to his new home and seems to get along fine with all my fish now. Definalty a great addition to the tank. He comes out often even during the day if its not too busy in the house. An algea wafer is a great bribe when I want to show him off!
Nikki H Gaffney , SC
I have kept many of theses guys. They are easy to care for. They are very beautiful to look at. They will shed their skin. I had one live for five years. Do be careful these guys are top notch escape artist. I had one of mine climb out of its aquarium. I nearly tore my bed room down looking for him till my dad found him hiding under my shower curtain. I think the main reason mine survived was due to the fact that cray fish have gill like structures on their under bellies that are designed to retain water.
Dan R San Antonio , TX
I purchased this awesome little guy (Julius) a few weeks ago and he has been a great addition to my African Cichlid tank. My tank is crushed coral, rocks, and a lot of driftwood. There are several caves throughout the tank that Julius loves to explore. What a fun animal, he likes to crawl to the top of a giant rock in the middle of the tank and leap off. One thing for certain is that he is definitely an attempted escape artist, I've had to block all the openings in the back to ensure he doesn't make a break for it! I would recommend one of these in a heartbeat, it adds a ton of character to any fish tank!
Denis T Fargo , ND
My lobster is now 2 months old- he has grown quite a bit (molted twice). He is a big eater.. He ate 3 snails in 2 days!!. I just can't keep snails in the tank- he works hard trying to set up his space-- of course when I do vacuuming I disturb it all and he just does it again- i LOVE him!
1-16 of 16 testimonials

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