Yes, a crab could potentially cut off a thumb with its pincers. Crabs have strong and sharp pincers that they use for defense and feeding. If a crab were to latch onto a person's thumb with enough force and leverage, it could potentially cause injury or even an amputation. It is important to handle crabs carefully and with respect to avoid any accidents. **

The best shrimp aquarium will depend on the specific needs and preferences of the shrimp species you plan to keep. Some popular choices for shrimp aquariums include the Fluval Spec V, the Waterbox Cube, and the ADA Cube Garden. It's important to consider factors such as tank size, water parameters, and the presence of live plants when choosing the right aquarium for your shrimp. Additionally, make sure to provide plenty of hiding places and a suitable substrate for your shrimp to thrive. **

A 20-liter aquarium can make a great shrimp tank, as it provides enough space for a small group of shrimp to thrive. Shrimp are relatively low-maintenance and can be fascinating to watch as they scuttle around the tank. It's important to ensure that the tank is properly cycled and maintained to provide a healthy environment for the shrimp. Additionally, adding live plants and hiding spots can create a more natural and stimulating environment for the shrimp. Overall, a 20-liter aquarium can be a suitable and enjoyable choice for keeping shrimp. **

Yes, there is a small spider-like creature called a pseudoscorpion that is similar to a scorpion but does not have long pincers. Pseudoscorpions are arachnids that are often mistaken for tiny spiders due to their similar appearance, but they lack the long, curved pincers that scorpions have. Instead, pseudoscorpions have small, crab-like claws that they use to capture prey. These creatures are found in a variety of habitats, including leaf litter, soil, and even in homes. **

Based on the description provided, the insect in question is likely a type of beetle known as a rove beetle. Rove beetles are elongated insects typically around 5mm in size, have six legs, and are known for their distinctive pincers located at the tip of their abdomen. Some species of rove beetles are capable of delivering a painful bite or sting when threatened or handled. **

Planarians are flatworms that are often found in freshwater environments, including aquariums. They are known to feed on small organisms like shrimp, so it is possible that planarians could be present in your shrimp aquarium. To confirm their presence, you can look for flatworms with a distinct triangular head shape and a smooth, flat body gliding along the surfaces of the aquarium. If you do find planarians in your shrimp tank, it is important to take steps to remove them as they can potentially harm your shrimp population. **

No, live food for the aquarium should not be poured into the tank with smelly water. Smelly water is a sign of poor water quality, which can be harmful to the fish and other organisms in the tank. It is important to maintain clean and healthy water conditions in the aquarium to ensure the well-being of the aquatic life. Live food should be introduced into the tank in a controlled manner to prevent any negative impact on the water quality. **

No, live food for the aquarium should not be poured into the tank with stinky water. Stinky water is a sign of poor water quality, and adding live food to such an environment can harm the fish and other aquatic life in the tank. It is important to address the stinky water issue by conducting water tests, performing water changes, and cleaning the tank before adding any live food. This will help ensure the health and well-being of the aquarium inhabitants. **