Tim's Tropical Fish






Freshwater Invertebrates

Cherry Shrimp, Neocaridina denticulata

Cherry Shrimp (Neocaridina denticulata red var.) These Red Cherry shrimp originated in wild freshwater streams and ponds in Taiwan. The water is fresh and the temperature is usually between 23 to 30 degrees C . They stay bright red all the time, but only if they have sufficient amounts of natural or artificial light.  For example, after shipping, they may appear light gray or black in color. After being placed in a water grass or other aquatic plant aquarium with sufficient overhead light, they will return to their bright red color within an hour. Their bright red color is very beautiful against the green colors of aquatic plants, and they are great tank cleaners.

These shrimp will also lose some of their coloring during the time when they shed their shells. They become light pink to whitish pink at that time. This shedding has been noted to occur around mid August in Taiwan. As these are a newly discover shrimp (summer 2002), they have not been observed for a lengthy amount of time.

Red Cherry Shrimp have a tolerance which extends from 15 to 28 degrees Celsius . At more than 30 degrees, they will become sick. The most appropriate temperature range for them is between 20 to 26 degrees Celsius.

These shrimp are also very sensitive to metal compounds, particularly copper. If tanks have been cleaned with disinfectants that contain metal compounds or copper, the shrimp may become sick and die.   The shrimp should not be exposed to any chemicals used to control ich.  Also, if the nitrate values are more than 25 mg/l (25 ppm), they cannot survive.

The shrimp are most active at night. It is best to turn off the light and feed them in the evening. Feed them algivorous or thread algae.


Florida Blue Crayfish

Florida Blue Crayfish - The Blue Florida Crayfish, Procambarus alleni, grows up to 15 cm in length and can tolerate temperatures from 10 - 22 degrees Celsius (50 - 70 Fahrenheit) so it is recommended that the aquarium not be heated.  These crayfish need oxygen, so an air stone at the bottom of the aquarium is recommended.  The aquarium should be completely covered.  Crayfish will climb out of the tank and then die of dehydration.

Crayfish do best on shrimp pellets and live blackworms.  Each crayfish needs a secure sanctuary within their aquarium, to feel secure.  Crayfish will seek this sanctuary on a regular basis, especially during and right after moulting.

Tankmates:  There are very few safe tankmates with crayfish.  This is because most tankmates either get eaten by the crayfish, or eat the crayfish.  Crayfish are especially vulnerable when their shells are soft, and when they are weakened, right after moulting.  Cichlids  are noted for eventually dining on crayfish.  Also, many tankmates get ruled out because they require tropical temperatures.  Crayfish generally need room temperatures.

Fan Shrimp and Malawi Blue Crab

Fan Shrimp    Malawi Freshwater Blue Crab