[Halocaridina]

Not something I am considering myself, but I saw the page on this site listing sites selling opae ula and noticed one of them was also selling these: https://www.garnelen-tom.de/zwerggarnel ... lpheops-sp
They are in the family Alpheidae, which is the same as the alpha opae ula and the pistol shrimp.

They are described as brackish water shrimp in the description with a optimal SG of 1.010, although they are also kept as freshwater shrimp. The temperature preferences also seem similar to opae ula. It mentions they grow 3-4cm, which would make them probably too large to be good tankmates for opae ula. However, other articles describe them as much smaller:

'Adults are a maximum of just over 1/4"'
http://www.planetinverts.com/Purple_Zebra_Shrimp.html

'Size: 0.25 in / 6 mm (both sexes)'
http://www.aquaticcommunity.com/shrimp/purple-zebra.php

'Size male/female: ~1.2cm'
http://www.shrimpnow.com/content.php/19 ... amalpheops

'Size Index: 0.5cm - 1.2cm'
http://nanocaridina.weebly.com/potamalpheops-sp.html

Would be interesting for someone to experiment with keeping these alongside opae ula.

[odin]

They look great don't they, i've seen them online before but only information and never for sale and i'm very tempted! I would setup a tank and buy some but i have to move house soon so I couldn't do it yet. I found this: http://www.aquabid.com/cgi-bin/auction/ ... 1472603493 from looking they look to be about the same size as the alphas. Feeding the larvae is needed and i would be worried about dosing the tank with liquid feed too much and causing nutrient spikes. You could have a separate larvae tank though!

[opae ula related]

Thanks for the links. Interesting, you can see the larvae after birth compared to Alpha Opae Ula which you can not see. Your first link mentioned they disappeared in a week, so assuming they starved to death.

Shrimpfever.com sells then for 3.49 each but are sold out.

[opae ula related]

Found a video of them.

[Halocaridina]

If that is a standard sized oak leaf, they seem fairly small in relation to it.

[opae ula related]

Quarter inch is the max size so they are small.