Do fish have nucleus and organelles?

Yes, fish, like all other eukaryotic organisms, have a nucleus and organelles.

Here's why:

* Eukaryotic cells: Fish cells, like all animal cells, are eukaryotic. This means they have a membrane-bound nucleus containing their genetic material (DNA) and various other membrane-bound organelles that perform specific functions.

* Nucleus: The nucleus is the control center of the cell, containing the DNA that dictates all cellular activities.

* Organelles: Fish cells have the same essential organelles found in other eukaryotic cells, including:

* Mitochondria: Powerhouses of the cell, producing energy (ATP).

* Endoplasmic reticulum (ER): Network of membranes involved in protein synthesis and lipid metabolism.

* Golgi apparatus: Processes and packages proteins for transport.

* Lysosomes: Contain enzymes for breaking down waste materials.

* Ribosomes: Sites of protein synthesis.

Therefore, fish cells are complex and highly organized, just like any other animal cell.