Re:salt water ghost shrimp special

#3892
Pete Giwojna
Guest

Dear Alisa:

Hey, that’s an excellent price for live marine ghost shrimp! Brackish water and salt water ghost shrimp make superb live foods for seahorses but are the most difficult type of ghosts for hobbyists to obtain. And those seahorse trees make ideal hitching posts for Pixies or dwarf seahorses (Hippocampus zosterae), in particular.

Here is some additional information on ghost shrimp for you hobbyists who may be interested in a great deal on these bite-size crustaceans:

GHOST SHRIMP or GLASS SHRIMP

Pros (Giwojna, Oct. 1996):
· A highly nutritious, natural food for large seahorses.
· Available from pet shops or aquarium stores as well as through the mail.
· Very easy to gut-load and enrich with various supplements
· Good tolerance for saltwater: brackish ghosts last surprisingly long, and even freshwater ghost shrimp survive long enough to be a very useful food.

Collecting Tips:

Ghost Shrimp are seasonally abundant along the Gulf Coast of the US in salt marshes, rivers that empty into the sea, tidal creeks and brackish bays (Ricketts, Robert T. 2003). Brackish Ghosts can be collected easily at low tide by vigorously shaking clumps of floating seaweed into a bucket of seawater, or by dragging a small seine or large aquarium net through tidal creeks or the grass flats just offshore (Giwojna, Oct. 1996). Similar techniques will often produce freshwater Ghost Shrimp from fresh streams or waterways, including grassy canals and ditches (Giwojna, Oct. 1996). Harvest only specimens that are small enough for your seahorses to swallow whole.

Aquarium specimens are available year round. Fish stores carry Ghost Shrimp both as feeders and as oddball pets for freshwater hobbyists (Giwojna, Oct. 1996).

Culture Instructions:

Ghosts do not thrive in soft water, so for best results keep them in slightly hard to alkaline water (Ricketts, Robert T. 2003). Like all crustaceans, these see-through shrimp shed their exoskeletons in order to grow. They may have difficulty molting and become stuck halfway through the process of extricating themselves from their old exoskeletons, particularly in soft water that is deficient in calcium (Ricketts, Robert T. 2003). For this reason, I recommend gradually converting your holding tank for Ghost shrimp to brackish conditions, using a high-quality marine salt mix to slowly raise the salinity (Ricketts, Robert T. 2003).

There are at least two distinct types of Ghost Shrimp (very likely more), which are very difficult to distinguish by casual examination (Ricketts, Robert T. 2003). One category of Ghost appears to be a true freshwater species. The freshwater Ghosts do not tolerate full-strength saltwater for any length of time but withstand brackish conditions without difficulty (Ricketts, Robert T. 2003). The other category of Ghost Shrimp is a brackish species that can be converted to full-strength saltwater, but which also tolerates freshwater for extended periods (Ricketts, Robert T. 2003).

One possible way to determine which type of Ghost Shrimp you have is to examine females that are "in berry" (carrying eggs attached to their swimmerets). The saltwater or brackish Ghosts carry huge numbers of extremely tiny eggs (Ricketts, Robert T. 2003). So small are these that individual eggs cannot be seen with the naked eye. The eggs of freshwater Ghosts are said to be much bigger so that separate eggs are visible (Ricketts, Robert T. 2003).

The freshwater Ghosts breed more readily in the aquarium, and the larval shrimp are somewhat easier to raise (Ricketts, Robert T. 2003), but home culture of Ghost Shrimp is not really practical regardless of which variety you obtain.

Feed Ghosts small amounts of dry food once daily. The fine, leftover particles that accumulate on the bottoms of nearly empty flake food containers are great for feeding Ghosts, or crumble fresh flakes between your fingers to create particles of that same consistency (Ricketts, Robert T. 2003). Soak these fine flakes in a good enrichment formula and then feed them to the shrimp about 30 minutes before feeding the Ghosts to your seahorses (Ricketts, Robert T. 2003). This will gut-load the shrimp and fortify them for maximum nutritional value. (You will actually be able to see the enriched flakes accumulate in the hindgut through the shrimp’s transparent body.)

A 10-15 tank will hold quantities of ghost shrimp, and smaller numbers will do fine in a 5-gallon bucket equipped with an airstone or air-driven foam filter (Ricketts, Robert T. 2003). Sponge filters will suffice; change water once a week to maintain water quality (Ricketts, Robert T. 2003).

Comments:

These shrimp are all but transparent, which explains why they are universally called ghost shrimp or glass shrimp. Their exoskeletons are perfectly clear, the underlying muscles nearly transparent, thus clearly revealing their internal organs and GI tract (Ricketts, Robert T. 2003). A loss of transparency is a sign of severe stress and poor health; upon death, Ghosts typically turn an opaque white like their namesakes (Ricketts, Robert T. 2003). Ghost shrimp are acrobatic swimmers, which propel themselves backward with amazing speed by flexing their tails beneath them.

Fully-grown Ghosts can reach two inches in length, but the best feeder shrimp for the greater seahorses are 1/10 to 1/4 that size (i.e., approximately 1/4 to 1/2 inches in length), so select your specimens accordingly (Ricketts, Robert T. 2003).

Respectfully,
Pete Giwojna


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