tomato horn worms.
It sounds like you may be describing the caterpillar of a Tomato Hornworm. They are bright green with yellow and blue spikes, and they can be as large as a tomato worm. They are known to feed on the leaves and fruits of tomato plants.
host plants
it is a Lime Hawk Moth originating from England
a bojencken caterpillar and they are poisen
I am unable to see the caterpillar you are referring to. If you can provide a description or image, I can try to help identify the species.
A caterpillar that is pink and as a blue horn and found in France is called a hawk moth. These moths can grow very large.
I don't know but i found the same caterpillar and i am curious as to what it is too.
Aquatic plants
To find out what type or caterpillar a person has, they must be able to recognize markings. A person can find out the type of caterpillar by researching the caterpillars markings, and location found.
Coconut trees, Tomato Plant, Apple Trees, Banana Tree etc. Those plants which bear fruit.
It can be a Monarch caterpillar or a Northern Florida caterpillar.
The American Dagger Moth's caterpillar is fuzzy and yellow with what looks like black spikes. But a closer look shows it is just fuzz.