Cotoid or Cottoid: How To spell?
The word Cotoid is misspelled against Cottoid, a noun meaning "A fish belonging to, or resembling, the genus Cottus. See Sculpin."
Cottoid has double "tt" is mispronounced as "t"Remember double 'TT' in between the strings co & oid which should not be misspelled with single 'T'
Wrong Spelling:  co-t-oid  Correct Spelling:  co-tt-oid 
Find more incorrect spellings of Cottoid to spell right way.