Your photo of sushi; front left is salmon nigiri,
front right is salmon roe "gunkan" style, where the toasted seaweed sheet is wrapped around the lozenge of rice to provide a shelf for the roe to sit on, then there's some cucumber sticks shoved in there too. This one will pop in your mouth and is like tiny savoury boba.
The red coloured fish you can see is tuna, the far left is tuna/maguro nigiri, then on the right of that is a tuna maki with seaweed/nori on the outside.
Maki means roll.
The other ones to the right are more maki rolls, I think I see avocado in some of them.
the black dots in the rice are black sesame seeds.
Right at the back left, with the yellow filling is a hosomaki, it looks like takuan/ pickled mooli. Which is an Asian radish. No fish in this one.
This photo is a pretty basic selection you will find in most sushi restaurants, with the exception of the roe, that's a little bit more unusual.
If it's a really good sushi place it should have uni /sea urchin on the menu!