For the most part you are looking at mid level for an aquarium. However they do go everywhere. My personal stocks I have seen tend to go more upper level than lower when not in the middle.
This is not likely. Because when they swim they keep their trunk in the air, and they don't usually swim into deep waters.
Angelfish are not dangerous to people. There are freshwater and saltwater angelfish. The freshwater angelfish grow to a size of a few inches, while the saltwater angelfish can grow up to 12-inches.
it depends on how deep, they usually can barley swim in deep water with a person on their back unless they are just going though a kind of deep river but they aren't really swimming. With or wit out someone not very fast at all.
They can but if it's in really really deep water they will probably panic and drown. Hope this helps.
Animalia
You probably scared it
In deep water
No they tend to prefer fast currents than the the sea (deep water) like rivers.
Carp swim an average of between 20 to 30 feet deep but have been known to swim as deep as 50 feet. They basically will go as deep as needed to get to their food.
yes
people that swim deep down in the ocean
To get to the other side! Where did you get the back and forth kind? Mine only swim to and fro. In semi-seriousness, angelfish in their natural habitat have freedom of movement and exercise that. In an aquarium, back and forth is the only way to go. If you will allow a moment of anthropomorphism, they're probably looking for the way out.
laidybirds are ladybugs, and no, laidybirds can NOT swim in deep waters. they would die like most insets do in water.
Its better to swim in the deep water but if you have a child its safe to swim in the shallow water.
Starfish have been known to live as deep as 6000m
As deep as they feel comfortable, it is different for each individual.
Yes, he can swim because I've seen him in deep water.