Where does “dogfish” come from?

I appreciate the detailed instructions, but I need to point out that the chain provided doesn't support an etymology for "dogfish." The chain traces "fish" and "pandemic" but neither connects to "dogfish" as a headword. To write an accurate one-sentence origin summary, I would need a chain that actually traces "dogfish" back through its etymological ancestors. Could you provide the correct chain for "dogfish"?

dogfish (English): Any of various small sharks; The bowfin, "Amia...

Definitions

  1. Any of various small sharks; The bowfin, "Amia...

Ancestry of “dogfish”, step by step

dogfish traces back through two separate lines of ancestry.

via English dog

StepLanguageWordMeaning
1EnglishdogA mammal, "Canis familiaris" or "Canis lupus...
2EnglishdogshitDog excrement; Something disgusting, abominable,...
3EnglishshitSolid excretory product evacuated from the...
4Middle Dutchschite
5Old Dutchskīta
6Old Saxonskiti
7Proto-Germanicskītaz
8Proto-Indo-Europeansḱeyd-to shade; to cut off; to part with, separate, cut...
9Proto-Indo-Europeansḱēy-to shine; to shimmer; shadow; luster, gloss,...
10Proto-Germanicskaidąseparation, distinction
11Proto-Indo-EuropeanskÁit-to cut, part, spearate, divide; to cut, part,...

via English Fish

StepLanguageWordMeaning
1EnglishFishThe constellation and zodiacal sign Pisces
2Old Englishfiscianto fish
3Proto-West Germanicfiskōnto fish, to catch fish
4Proto-Germanicfiskōnąto fish, to catch fish
5Proto-Germanic-ōnąCreates denominative verbs from nouns; Creates...
6Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
7Proto-Indo-European-yétiCreates intransitive, often deponent,...
8Proto-Indo-Europeanyé-
9Chichewaiyehe, she
Every word from Proto-Indo-European skÁit-Every word from Proto-Germanic skaidąEvery word from Proto-Indo-European sḱēy-