)
)
)
Under poor condition with 5"X5" full tank dirty freshwater with little simple plant, pH around 8-9
Conical shell snail
Under fine condition with basic criteria: 5"X16" full tank of freshwater, bio rings
Under poor
condition with 5"X5" full tank dirty freshwater with little simple
plant, pH around 8-9
)
Food: Bottom fish food, Dry food, grass and dry shrimp
Recommend: air-pump with sponge filter, heater and keep the water in transparent
colour
Petting
time:
from 2004/1/
Discoidal shell snail
)
)
Food: Bottom fish food, Dry food, grass and dry shrimp
Basic criteria: full tank of freshwater, bio rings
Recommend: air-pump with sponge filter, heater and keep the water in transparent
colour
characteristic
high vitality (can live even the shell cracked)
Swimming
Sometime, it may swim upside down under the water
level and moving their shell to swim faster
Petting time: from 2004/12/
| Environment | freshwater | |
| Snail type | Conical shell snail | Discoidal shell snail |
| size | max. 2 cm | over 1 cm |
| life-time | 3 - 5 months | over 9 months |
| food need | high | normal |
| eggs | 100 eggs in 10 groups of eggs | 50 eggs in 10 groups of eggs |
|
lay eggs (all the year) |
around 1 cm | around 0.5 cm |
| growth | fast | slow |
| temperature | 10℃-28℃ | 10℃-28℃ |
| diving time | shorter | longer (bigger shell) |
| vitality | low | high |
| breath | use a special organ to breath air when it near the the water level | |
The graph show that Discoidal shell snail need
to have the alga in its shell,
otherwise it may unhealthy or death
Fresh conical shell snail
Adaptability
when this two snails breed in the same tank
| Environment | freshwater | |||||||||||||
| Snail type | Conical shell snail | Discoidal shell snail | ||||||||||||
| generation |
|
|
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| healthy level of the shell |
|
|
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| no. of snail growth up |
|
|
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Fertilization
All of them can
fertilized by itself (hermaphrodites) or others
)
The small snail using the special organ join in the big snail body.
The big snail using the special organ join in the
small snail body.
As the same time, the small snail can eating normally
In general, the active breeding snail do not eating during the process
Breed
Warm environment (22-28℃)
is more suitable for this snail breed
and eggs will become babies around half of a month
)
)
early stage
only have a small group of cells in the egg
)
final stage
the cells in the egg grow to a small snail
Growth
The snail have high adaptability when it is a baby, even without a good air flow
Genetic change
Original fresh conical shell snail body is grey
in generation 4, found two of the snail body is white colour since it is baby to adult
)
The snail at the bottom is white and it is different from the top one.
)
when it growth to adult, its colour also keep in white and different from the original one
Death
)
)
They remain their shells after death and the shell will lose the original pattern and become brown
)
)
the egg cells become small snail and it started moving inside the egg
the small snail born successfully
)
The pictures show four eggs in a group, the left
two have snails growing inside
and the right two snails growth out from the egg and leaving the empty egg
cells
)
The pictures show a clearer image of two eggs and it started to move
Double shell snail
)
length: 9 cm
buy from aquarium shop
Foraging
It have two pipes to filter water for food, when
foraging it open its shells a little bit and stretch out two pipes
the big one with antenna (can help detect the environment to find food and
protect itself),
is to suck in the water
the small one is to flow out the water
the video show its motion in 1.5 minutes
the small pipe can search the best position to flow out the water, avoid
re-filter the filtered water
)
)
up
down
the small pipe can move up or down
start petting
time: 2006/10/14
Summary
Freshwater snail is also a easy to breed. The most important thing is keep it alone and make sure they can get enough oxygen by breathing air from the water level.
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