1. How does it move? It has jointed legs, antennae or a shell with limbs poking out

How many legs, and what shell?

Most of these are visible to the naked eye. Start at 20–40×.

1. Four pairs of stubby legs with claws; slow and clumsy→ Tardigrades
2. A clear shell, a dark eye, big branched antennae, swims in hops→ Water fleas
3. Teardrop body, long antennae, darts; often egg sacs at the rear→ Copepods
4. Completely inside a bean-shaped hinged shell; legs poke out→ Seed shrimps
5. A round body with eight legs, often red, swims steadily→ Water mites

Not sure? How to judge size by the field of view · This step looks wrong