Shethfish or Sheathfish: How To spell?

The word Shethfish is misspelled against Sheathfish, a noun meaning "Same as Sheatfish."

Sheathfish has vowels 'ea' together mispronounced as 'e'
Word contains consecutive vowels 'EA' in between alphabets sh & thfish is misspelled as 'E'
Wrong Spelling:  sh-e-thfish 
Correct Spelling:  sh-ea-thfish 
Find more wrongly spelled words of Sheathfish to spell it well.

You might be interested to know

Spekership or Speakership?

Stelthiness or Stealthiness?

Sublese or Sublease?