Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_19165 ( "State" text, "Highest point" text, "Highest elevation" text, "Lowest point" text, "Lowest elevation" text, "Mean elevation" text )

### Question ###
how many mean elevation with lowest point being gulf of mexico and state being texas

### Accurate SQL ###

SELECT COUNT("Mean elevation") FROM table_19165 WHERE "Lowest point" = 'Gulf of Mexico' AND "State" = 'Texas'