CREATE TABLE table_29151 ("Common Name" TEXT, "Genus & Species" TEXT, "NCBI Accession Number" TEXT, "Length  ( AA ) " FLOAT, "% Identity to C7orf38" FLOAT, "% Similarity to C7orf38" FLOAT)

What is the % similarity to C7orf38 of the animal whose % identity to C7orf38 is 81?
SELECT MAX("% Similarity to C7orf38") FROM table_29151 WHERE "% Identity to C7orf38" = '81'
SELECT MAX("% Similarity to C7orf38") FROM "table_29151" WHERE "% Identity to C7orf38" = '81'