No. The nucleus is often compared to the brain, but it is not really a brain made of brain tissue.
Brains
Water surrounds our cells and blood stream as it travels throughout our body and our brains, so water if found in cells as it's a fertiliser of some kind
Yes, all arthropods have brains.
Yes, all cells have DNA (hereditary material) except the mature red blood cell.
Yes. They are specialized cells. (:
yes like ..... like what you do in bed
The same number as ordinary people.
billions of cells.
Yes. Salmon, like all fish, have brains.
Electroencephalography or EEG
No they do not. They do have addictive qualities though, which can be unhealthy.
The primary cell in the brain is the neuron. There are also many supporting cells, such as astrocytes, glial cells and the like.