Kibbutz Sde Elyahu actually does export spiders from Israel, and they are very useful, see http://www.globes.co.il/en/article-israeli-spiders-to-hunt-colombian-field-mites-1001083307
But if the imported spiders are dried then it will help us remember the verbs in this lesson.
According to the Hebrew academy should be 'k' sound like in the singular word עכביש (akavish).
But generally speaking Modern Hebrew speaker would use "akavishim".
I'm always amazed at the knowledge you have, Ingeborg. May I ask where all your learning has come from?