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Old 07/20/2017, 03:28 PM   #1
aquatictec
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Hawaiian Harlequin Shrimp Project

07/20/2017
Having succeeded with the Indonesian Harlequin Shrimp Hymenocera elegans we have turned our resources to breeding the Hawaiian Harlequin Shrimp Hymenocera picta.

Some experts have claimed them to be the same species but they look different, their larvae are colored differently, they have some behavioral differences and they come from different geographical areas. Sort of like the definition of a species.

Here is a link to our original work on H. elegans

http://www.reefcentral.com/forums/sh....php?t=2445470

We had a large Hawaiian pair. They had a few successful releases and then then the female died. We were not successful in raising the larvae.
We took the female form our Indo pair and put her in with the surviving Hawaiian male.

We also obtained another Hawaiian pair but they have not spawned yet.

We currently have about 20 larvae from the mixed pair. They were hatched on July 5th. They are noticeably smaller than H elegans larvae and have a green-brown tint instead of a brown tint.

Both pairs of Hawaiian shrimp and the mixed pair we now have managed to kill starfish long before they had consumed it. All the Indonesian harlequins that we had over the years managed to keep the starfish alive until it was nearly consumed. Because of this we feed them pieces parts to keep from wasting starfish.

We are still working on an alternative food source for harlequins shrimp. We can get them to eat most anything but they tend to die after a few weeks on other foods.


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Old 07/27/2017, 07:10 PM   #2
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still going

The 20 larvae are still going strong at 2 days.


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Old 10/03/2017, 04:33 PM   #3
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We had a very large release today October 3, 2017 in the thousands. I collected them and placed them in a Kreisel with T-iso and parvocalanus copepods


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Old 11/01/2017, 02:28 PM   #4
rajilnaja
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Quote:
Originally Posted by aquatictec View Post
We had a very large release today October 3, 2017 in the thousands. I collected them and placed them in a Kreisel with T-iso and parvocalanus copepods
Any updates?


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Old 11/02/2017, 05:46 PM   #5
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update

We haven't been able to raise any to settlement yet. We had one batch a week from settlement and lost it to hydroids. We have a batch of 150 going that was released on October 30th


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Old 12/19/2017, 01:35 PM   #6
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December 18th we had 24 settle out at 38DPH.
As far as I know this is the first time anyone has raised any in the continental U.S. and certainly in Ohio!


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Old 12/28/2017, 01:11 PM   #7
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Settlement update:
Dec 18 24
Dec 20 7
Dec 24 27
Dec 27 12
Dec 28 5
Jan 1 6

Who wants to buy one of the first commercially available captive raised Hawaiian Harlequin Shrimp?



Last edited by aquatictec; 01/11/2018 at 03:27 PM. Reason: wrong numbers
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Old 12/29/2017, 04:41 PM   #8
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What are they feeding on?


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Old 01/07/2018, 11:05 AM   #9
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asterina starfish


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Old 01/11/2018, 03:56 PM   #10
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We had a total of 81 Hawaiian Harlequin shrimp settle
The parents released over a thousand larvae
Due to the large amount of copepods required to raise them we only collected about 150 to raise to settlement
Settlement took place over a 19 day period.,
At the beginning of settlement we ran out of parvo and iso and had to feed apocyclops grown on rotigrow.
That may have stretched out the time to settle

As opposed to the Harlequin shrimp from Indonesia
The Hawaiians:
were much smaller and greener as opposed to brown at release
settled in less time and were smaller at settlement
are a different color (more yellow)

Adult Hawaiian Harlequin shrimp:
tend to grow larger than Indonesian shrimp
are yellower
Are not as adept at keeping a starfish alive until it is all consumed

We have mixed pairs and they have produced larvae. We have not got them to settlement yet

The two "species"
are reproductively isolated from each other.
are most likely capable of producing fertile mixed offspring but that remains to be seen
Have different characteristics (color, larval, juvenile and adult size)
Appear to have different settlement periods



Last edited by aquatictec; 01/11/2018 at 03:59 PM. Reason: spelling
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Old 01/11/2018, 04:04 PM   #11
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I don’t have an Asterina population or a sump to keep a Chocolate Chip Star in. Would they take a frozen starfish arm? Should I not attempt these guys in a nano because they are messy eaters?


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Old 01/12/2018, 05:25 PM   #12
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https://www.facebook.com/AquaticTech...353890/?type=3

They are still quite small but we have 81 of them.
The worlds first commercially available captive raised Hawaiian Harlequin Shrimp

Aquatic Technology
26966 Royalton Road
Columbia Station, OH 44028
(440) 236 8330


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Old 01/23/2018, 05:24 PM   #13
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Do the hawaii spp have more blue than indo?


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Old 01/25/2018, 06:15 PM   #14
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Inredible job, have room for a pair


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Old 02/01/2018, 03:38 PM   #15
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Check this video update. In this video shot January 31, 2018 they are between 25 and 44 days old. The larger ones are around 3/4". Due to the cold weather they are currently for sale in store only. The larger ones are $150.00 the smaller ones are $100.00.

https://www.facebook.com/AquaticTech...8288912640089/


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Old 02/01/2018, 07:24 PM   #16
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Is male and female apperent when small?


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Old 02/04/2018, 11:42 AM   #17
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I don't know about the Hawaiians yet but the Indos weren't able to be sexed until they were about 4 to 6 months old.
(The color (dots) did not show up under the females abdomens)
Currently some are way bigger than others so probably the females are the larger ones and the males the smaller ones


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Old 02/07/2018, 06:36 AM   #18
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Will hit you up for a pair when it warms up. Do you sell c.c starfish?


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Old 02/07/2018, 05:58 PM   #19
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pairs

It is hard to say for sure when they become sexually dimorphic. It is probably at least 3 months. In large groups like we have them they all hang out together.


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Old 05/05/2018, 01:54 PM   #20
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We have approximately 40 left that we have not sold. We are holding on to them until they become sexually mature. Our Indonesian Harlequins became sexually dimorphic at 5 months. If these follow suit we should be able to sex them this June. We plan on selling the pairs as WYSIWYG for $299.95. These will be the first captive bred Hawaiian Harlequin Shrimp Pairs ever offered for sale. If you are interested please email us at [email protected] aquatictec at aol dot com or call us at 440 236 8330 with you name and phone number and we will give you first crack at them when they become available.



Last edited by aquatictec; 05/22/2018 at 05:19 PM.
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Old 07/10/2018, 12:52 PM   #21
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Generation 2 Hawaiian Harlequin Shrimp

Gen 2

We had a larval release from our Hawaiian pair of Harlequin Shrimp today. What is unique is that the female is captive raised from our December 18, 2017 batch

Only one shrimp from the December 18 batch has show color on its abdomen so far. We paired it with a wild male a month or so ago They had their first larval release today or last night. I am really not sure how many larvae I collected I am guessing around 40. She had way more we just got to them too late.


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Old 07/11/2018, 06:12 PM   #22
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Are getting close to sexing ?


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Old 07/31/2018, 08:48 AM   #23
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There will be more available within the next few months.
We are selling them as sexually mature pairs. The price is $300 per pair plus freight or you can pick them up. As they mature we pair them up and then offer them to whoever is first on the waiting list and then down the line. When/if the waiting list is exhausted we will publish the pairs here. If you want on the list send us an email with your contact info and we will be glad to add you


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