How does it move?
Watch for a minute at 40× or 100× before deciding. If it does not move at all, pick the last answer.
- It is fixed to something by a stalk, a foot or a base, and contracts when disturbed→ next question
- It swims or glides, and you can see a fringe of fine hairs or whirling crowns→ next question
- It swims with one or two long whips, often green; or it is a rolling green ball→ next question
- It creeps by flowing, pushes out lobes, sits in a shell, or has stiff rays→ next question
- It has jointed legs, antennae or a shell with limbs poking out→ next question
- It is a worm: long, bending, thrashing or gliding→ next question
- It hardly moves or only glides slowly; green or golden-brown cells, threads or boxes→ next question