| australia | | chthamalus antennatus | species | 1 | 0 |
| australia | victoria | chthamalus antennatus | species | 1 | 0 |
| cape verde | | chthamalus stellatus | species | 12 | 0 |
| croatia | dubrovnik-neretva county | chthamalus stellatus | species | 50 | 0 |
| cyprus | larnaca district | chthamalus stellatus | species | 55 | 0 |
| france | provence-alpes-cote d'azur region | chthamalus stellatus | species | 18 | 0 |
| french polynesia | | chthamalus proteus | species | 1 | 0 |
| indonesia | | chthamalus moro | species | 22 | 0 |
| iran | | chthamalus barnesi | species | 2 | 0 |
| ireland | munster province | chthamalus stellatus | species | 23 | 0 |
| israel | | chthamalus stellatus | species | 28 | 0 |
| israel | haifa district | chthamalus stellatus | species | 1 | 0 |
| italy | friuli-venezia giulia autonomous region | chthamalus montagui | species | 9 | 0 |
| japan | aomori prefecture | chthamalus challengeri | species | 106 | 0 |
| japan | aomori prefecture | chthamalus dalli | species | 1 | 0 |
| japan | chiba prefecture | chthamalus challengeri | species | 2 | 0 |
| japan | hokkaido prefecture | chthamalus challengeri | species | 427 | 0 |
| japan | hokkaido prefecture | chthamalus dalli | species | 244 | 0 |
| japan | iwate prefecture | chthamalus dalli | species | 1 | 0 |
| japan | kanagawa prefecture | chthamalus challengeri | species | 2 | 0 |
| japan | shizuoka prefecture | chthamalus challengeri | species | 1 | 0 |
| madagascar | analanjirofo region | chthamalus dentatus | species | 6 | 0 |
| malta | birzebbuga | chthamalus stellatus | species | 71 | 0 |
| mexico | guerrero | chthamalus fissus | species | 6 | 0 |
| mexico | sonora | chthamalus anisopoma | species | 4 | 0 |
| morocco | rabat-sale-zemmour-zaer | chthamalus montagui | species | 2 | 0 |
| oman | | chthamalus barnesi | species | 1 | 0 |
| portugal | | chthamalus stellatus | species | 22 | 0 |
| portugal | faro district | chthamalus montagui | species | 56 | 0 |
| portugal | madeira autonomous region | chthamalus stellatus | species | 44 | 0 |
| singapore | | chthamalus malayensis | species | 1 | 0 |
| south africa | eastern cape province | chthamalus dentatus | species | 75 | 0 |
| south africa | kwazulu-natal province | chthamalus dentatus | species | 7 | 0 |
| spain | | chthamalus montagui | species | 12 | 0 |
| spain | | chthamalus stellatus | species | 8 | 0 |
| spain | andalusia | chthamalus stellatus | species | 53 | 0 |
| spain | asturias | chthamalus montagui | species | 26 | 0 |
| spain | asturias | chthamalus stellatus | species | 30 | 0 |
| spain | canary islands | chthamalus stellatus | species | 55 | 0 |
| spain | melilla | chthamalus stellatus | species | 45 | 0 |
| tanzania | dar es salaam region | chthamalus malayensis | species | 9 | 0 |
| tunisia | bizerte governorate | chthamalus stellatus | species | 46 | 0 |
| united kingdom | england | chthamalus stellatus | species | 1 | 0 |
| united states | california | chthamalus dalli | species | 0 | 1 |
| united states | california | chthamalus fissus | species | 85 | 1 |
| united states | hawaii | chthamalus proteus | species | 2 | 0 |
| united states | oregon | chthamalus dalli | species | 0 | 1 |
| united states | virginia | chthamalus fragilis | species | 3 | 0 |
| yemen | | chthamalus barnesi | species | 3 | 0 |