Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
List of U.S. state shells
Table title:
Table
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > State </th><th colspan=1 rowspan=1 > Shell </th><th colspan=1 rowspan=1 > Image </th><th colspan=1 rowspan=1 > Year designated </th></tr>
<tr> <th colspan=1 rowspan=1 > Alabama </th><td colspan=1 rowspan=1 > Johnstone's junonia Scaphella junonia ssp. johnstoneae </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1990 </td></tr>
<tr> <th colspan=1 rowspan=1 > Connecticut </th><td colspan=1 rowspan=1 > Eastern oyster Crassostrea virginica </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1989 </td></tr>
<tr> <th colspan=1 rowspan=1 > Florida </th><td colspan=1 rowspan=1 > Horse conch Triplofusus papillosus </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1969 </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > Georgia </th><td class="highlighted"  colspan=1 rowspan=1 > Knobbed whelk Busycon carica </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1987 </td></tr>
<tr> <th colspan=1 rowspan=1 > Massachusetts </th><td colspan=1 rowspan=1 > Wrinkled whelk or New England Neptune Neptunea lyrata ssp. decemcostata </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1987 </td></tr>
<tr> <th colspan=1 rowspan=1 > Mississippi </th><td colspan=1 rowspan=1 > Eastern oyster Crassostrea virginica </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1974 </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > New Jersey </th><td class="highlighted"  colspan=1 rowspan=1 > Knobbed whelk Busycon carica </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1995 </td></tr>
<tr> <th colspan=1 rowspan=1 > New York </th><td colspan=1 rowspan=1 > Bay scallop Argopecten irradians </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1988 </td></tr>
<tr> <th colspan=1 rowspan=1 > North Carolina </th><td colspan=1 rowspan=1 > Scotch bonnet Semicassis granulata </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1965 </td></tr>
<tr> <th colspan=1 rowspan=1 > Oregon </th><td colspan=1 rowspan=1 > Oregon hairy triton Fusitriton oregonensis </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1989 </td></tr>
<tr> <th colspan=1 rowspan=1 > Rhode Island </th><td colspan=1 rowspan=1 > Northern quahog Mercenaria mercenaria </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1987 </td></tr>
<tr> <th colspan=1 rowspan=1 > South Carolina </th><td colspan=1 rowspan=1 > Lettered olive Oliva sayana </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1984 </td></tr>
<tr> <th colspan=1 rowspan=1 > Texas </th><td colspan=1 rowspan=1 > Lightning whelk or Prickly whelk Sinistrofulgur perversum ssp. pulleyi </td><td colspan=1 rowspan=1 > Busycon perversum 01.JPG </td><td colspan=1 rowspan=1 > 1989 </td></tr>
<tr> <th colspan=1 rowspan=1 > Virginia </th><td colspan=1 rowspan=1 > Eastern oyster Crassostrea virginica </td><td colspan=1 rowspan=1 > - </td><td colspan=1 rowspan=1 > 1974 </td></tr>
</table>
Question:
What is the state shell of New Jersey and Georgia?
Answer:
Knobbed whelk is the state shell of New Jersey and Georgia.