Join issue for two tables - php

Question

I can not get Select to work properly. I'm fairly familiar putting img src and have used loops before but the select is stumping me.
I have two tables. TableA (Aid, Aname, Adescription) TableB (Bid, Bimagefile, Aid). TableB holds multiple images which belong to TableA Aid. There may be 5 images for one Aid and 3 images for another Aid.
How can I write the Select and Join so I only see images related to 1 TableA Aid? I have the following
$query = "SELECT TableB.Bid, TableB.Bimagefile, TableA.Aname
FROM TableB
INNER JOIN TableA ON TableB.Aid = TableA.Aid";
but the results are a complete list of all Aname and their matching Bimagefile. I need to have the result show for one Aid. Help please.
$stmt = $con->prepare($query);
$stmt->execute();
$num = $stmt->rowCount();
if($num>0){
echo "<table class='table table-hover table-responsive table-
bordered'>";
echo "<tr>";
echo "<th>Name</th>";
echo "<th>Image</th>";
echo "</tr>";
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
extract($row);
echo "<tr>";
echo "<td>{$Aname}</td>";
echo "<td>{$Bimagefile}</td>";
echo "</tr>";
}
echo "</table>";
}