Shrimps in the aquarium and descriptions of the most popular species
Freshwater types of shrimps in aquarium
We can distinguish dwarf shrimps (e.g. Tiger, Bee, Amano, Fire Red), filtering shrimps and long-arm shrimps (also: longarm or long arm) (e.g. Ghost). Below are listed the most common freshwater shrimps in aquariym.
Babaulti Green shrimp
Red Cherry shrimp
Crystal Red shrimp
Facts and myths about shrimps
- 6 abdomenal segments
- Antennal peduncle with 3 segments
- Scaphocerite (antennal scale)
- Maxillipeds - the first and second pairs
- Maxillipeds - third pair
- Pereiopods - 5 pairs of walking legs, the first two ended dactyls, another chelae
- Pleopods - 5 appendages used for swimming, the female holds the eggs them
- Endopod - part of the pleopod
- Exopod - part of the pleopod
- Two uropods
- Telson - covering the anus
Many people think that shrimps are effective antidote with to the growth of algae and mosses in aquarium. These crustaceans feed algae and they can clean our tank but not in aquarium where is a serious problem with algal bloom. There is high concentration of ammonia, nitrites or nitrates, phosphates and large oxygen deficit in this aquarium. Accumulation of these all compounds is deadly to shrimps. So algae must always be under strict control in tanks where we keep any shrimps. The shrimps need crystalline clean and oxygen-rich water, without heavy metals (especially copper compounds) and other chemical substances. Aquarium should include lot of plants and hiding-places, a spongy filter with protected outlet, a heater and a lighting. We shouldn't keep the shrimps with fish which can hold these crustaceans in their mouth and with their natural predators in a general tank with fish. Safe tank mates will be: neon tetras, microrasboras, small corydoras and otos. Stressed shrimps often lose their colours and they can escape from aquarium. Stressed females can leave their eggs which they hold under their abdomen. The shrimps prefer to live in groups. Then they are less shy and timid. We should have minimum 20 liter of water per 5 dwarf shrimps.
- Molting (moulting) - each shrimp molts in order to grow i.e. it casts off its outer shell. Then the shrimps behave differently than usual. They are apathetic, without appetite, they hide among plants or other decorative elements. When the shrimp molts it vigiriusly bends at the "waist" and it almost touches the head of its tail. Next the shrimp hides until its a new shell will be hardened unless it is matured sexually female. Then she starts to reproduce. We shouldn't remove the old shells because it is valuable source of calcium for shrimps.
- Hemimetabolism and holometabolism - incomplete and complete matamorphism - these are two modes of development of crustaceans. Incomplete metamorphism (hemimetabolism) is when miniature shrimp like adult hatches from egg - it is about 1 or 2 mm long. It starts immediately feeding but its internal organs aren't fully developed - especially reproductive organs. These organs will gradually develop during next metamorphosis/molts. This shrimp doesn't need transfered to brackish water - it lives, reproduces and transforms in fresh water. Complete metamorphism (holometabolism) is when larvae (nauplius) hatches from egg. This first larvae has 3 pairs of legs and its body isn't divided into segments. It falls on the bottom or hangs under the water surface and it starts immediately feeding. Its food is very small plankton and organic matter. Larvae of shrimps which transform complete may need or not brackish water for further development - it depends on specific of species. The young will look like adults after a few larval stages and metamorphosis.
- Serrata shrimp group (group of C. serrata) - this is group of shrimps from China which have common morphological features. These features veryfied, classified and systematized Y.CAI and K.NG. They described and published these informations in Jurnal of Natural History (33, 1603-1638) in 1999s. Characteristic features of serrata shrimp group:
- long stylocerite (scale developed from the lateral base of the first segment of the antennular peduncle) which is visible longer than first segment of the antennular peduncle,
- rostral dentition - teeth on the upper part of the rostrum,
- male's endopod of the first pleopod has characteristic, well developed appendix interna,
- female lays large in size eggs,
- larval stage is shortened.