Halfblack Blue Koi Angelfish

Large  (Size:L-XL) $25.75, veil add $3 Genetically, these are 100% Halfblack, but they only have partial expression of the pattern. It will likely take another generation or two to "fix" the pattern. Fish in the video are the exact fish being sold.

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  • Description
  • Shipping Options
  • How To Prepare For Your Fish
  • Important Stuff
  • Fish Guarantee
  • Angelfish Sizes
  • Discounts

Halfblack All Halfblacks start out looking like wild-type silvers. The pattern develops under good conditions on most of the fish. They can "turn" almost overnight. You can save money by purchasing them before they develop the complete pattern. Even if they don't "turn", or only partially "turn", they are still genetically Halfblack and their offspring will be capable of developing the pattern.

Het.(heterozygous) Halfblacks are fish with only one Halfblack gene. This means they cannot turn halfblack (because halfblack is a recessive trait), but 25% of their F1 offspring will have the ability to express the pattern.

How We've Improved Them: Halfblack is recessive, and most people keep randomly breeding siblings, which weakens the strain. We've spent the last 5 years improving Halfblacks. We crossed them to some wild Peruvians and then worked for a few generations to get them expressing the pattern better. We ending up with a very vigorous line that is starting to express the pattern in a high percentage of their offspring.

"Unturned" Halfblack: We have some fish that do not express the pattern at the time we offer them for sale. Many will express it at a later date. We offer them at a lower price when they haven't already "turned".

Please carefully read the information at each of the following links so you understand the shipping choices and procedures.

Shipping Options

Shipping Quote

Fish Acclimation Instructions

How to prepare for your new fish are found in the text below. Please read this carefully. It is very important to fully understand this before we ship your fish.

Our Guarantee

Angelfish Sizes


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Steve's line of halfblack are probably the nicest I have ever seen. Everything about them is superior to other halfblack I've owned from other sources (patter, shape, fins, etc). The offspring I'm getting from the fish I bought are vigorous and no issues getting them to express the halfblack pattern. Couldn't ask for more.
Paul, Thu Jan 25, 2018
These half blacks are so nice and healthy. Bought 5 about 3 months ago and have been growing since with great break between the black and silver colors. I have purchased some from other sites (my mistake) and was disappointed in the fish quality and health. Steve and his crew know what they are doing to give you the nicest fish around. Not the first time buying from Angels Plus and not my last.
Frank Breitwieser, Sun Oct 29, 2017
I purchased some of these half blacks from Angels Plus. I've had them for a while now and just had to leave a comment here because they are so magnificent. Very healthy and just stunning fish.
Jay Allen, Fri Jan 01, 2016
I received two half black medium sized angels. They are stunning!!! Beautiful long fins and great coloring!! Shipped in a well protected package!
Tamra Griffith, Tue Jul 07, 2015
I received fantastic looking halfblacks from angels plus. The pattern is dark and defined. the fins are also wonderful.
Amy Miller, Thu Jun 25, 2015
These HalfBlacks are the treasures of my tank. I cannot believe how gorgeous they are. They are super healthy, breathtaking, perfect fins and colors. Wow...just an awe inspiring Wow!!!
Victoria, Sun Mar 22, 2015