Hello, I'm not so good in English, and certainly not when I am about as specific topics such as Invertebrates wants to maintain. Would it perhaps makes sense a kind of dictionary to create, with the key words (for example, adult, etc)?
I don't think that it makes sense to create such a dictionary. Most specific words are the same in german and english (e.g. [lexicon]adult[/lexicon], gonopod, femur etc.) and there are enough good online dictionaries like leo.org.
But if you don't find a specific word you are free to ask here.