What are fish that stick to sharks called?
It is called a Remora fish.
It largely depends on what type of fish. Generally, a group of fish is called a school. However, sharks are fish as well and a group of sharks is called a gam, herd, pod, or shiver. Rays are also fish, but groups of rays are called a fever, draught, drift, scale, school, or shoal. Eels, another type of fish, in a group are called a swarm. A group of barracuda are called a battery. A…
The fish commonly called "?sharks" in a freshwater aquarium are not sharks but usually are some form of catfish or loach that happen to bear a slight physical resemblance to the sharks that live in the oceans. Most of these so called "sharks" come from the tropical far east and like a temperature of around 78F.
The fish that follow sharks and eat the scraps of a kill could be any fish looking for an easy meal. The fish that latch on to sharks and eat parasites are called remora (plral Remora or remoras). They are part of a symbiotic relationship in which the shark gets rid of parasites and the remora gets a meal.
Sharks are fish and get their air/oxygen from the water. Some sharks, like the Great White, stick their heads above water to have a look around (as does the mammal Killer whale), but, sharks do not need to come up for air. Sharks would die of suffocation if their gills were out of the water for a long period of time.