Esto funciona:
Código PHP:
$result = mysql_query("SELECT DATE_FORMAT(Pleamarma, '%h:%i') as Pmarma, DATE_FORMAT(Pleamarta, '%h:%i') as Pmarta,
DATE_FORMAT(bajamarma, '%h:%i') as Bmarma, DATE_FORMAT(Bajamarta, '%h:%i') as Bmarta,
DATE_FORMAT(fecha,'%d/%m/%Y' ) as fecha_es FROM mareas ORDER BY fecha DESC LIMIT 10");
while ($row = mysql_fetch_object($result))
{
echo "<TR>";
echo "<table rules=rows $camcolor='$bgcolor' cellpadding='2' bordercolor='#c0c0d9' onmouseover=\"this.style.background='#cacaf3'\" onmouseout=\"this.style.background='$e6e2dd'\">";
echo "<TD width=100 align=left class=cuadro>".$row->fecha_es."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->Pmarma."</TD>";
//Recuerda poner los campos que faltan a tu consulta
echo "<TD width=60 align=left class=cuadro>".$row->pleamarmaal."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->pleamarmaco."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->Pmarta."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->pleamartaal."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->pleamartaco."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->Bmarma."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->bajamarmaal."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->Bmarta."</TD>";
echo "<TD width=60 align=left class=cuadro>".$row->bajamartaal."</TD>";
echo "</TR>";
}
mysql_free_result($result);
echo "</TABLE>";
P.D. Trata de analizar el codigo antes de copiar y pegar