| Halocordylidae |  |  |  |  |  |
| Haminoeidae |  |  |  |  |  |
| Hapalocarcinus
marsupialis | coral
gall crab |  | Occasional | Native | |
| Hastula strigilata |  |  | rare | Native |  |
| Haumea juddi | Judd's
scallop |  | Uncommon | Native |  |
| Heliacus
variegatus |  |  | rare | Native |  |
| Herdmania
momus | Herdman's
sea squirt |  | Occasional | Native |  |
| Herviera
gliriella |  |  | Occasional | Native |  |
| Heterocentrotus
mammilatus | red
pencil urchin | hauke'uke
'ula'ula | Common | Native |    |
| Hexibranchidae |  |  |  |  | |
| Hexibranchus
sanguineus | Spanish
dancer |  | Common | Native |       |
| Hippolytidae | hump-backed
shrimp |  |  |  |  |
| Hipponicidae | hoof
shells |  |  |  |  |
| Hipponix
australis | conical
hoof shell |  | Occasional | Native |  |
| Hipponix
imbricatus | shingly
hoof shell |  | Abundant | Native |    |
| Hodometrica
prolixa |  |  | occasional | Native |  |
| Hololepidella
nigropunctata |  |  | Occasional | Native |  |
| Holothura
arenicola | sand
sea cucumber | kohe
lelewa | occasional | Native |  |
| Holothura
atra | black
sea cucumber | loli
okuhi kuhi | Common | Native |    |
| Holothura
cf. rigida |  |  | occasional | Native |  |
| Holothura
difficilis | difficult
sea cucumber | loli | occasional | Native |  |
| Holothura
hilla | light-spotted
sea cucumber | loli | Common | Native |    |
| Holothura
impatiens | impatient
sea cucumber | koko | occasional | Native |      |
| Honothura
inhabilis |  |  | occasional | Native |  |
| Holothuia
pardalis | leopard
sea cucumber | loli | Uncommon | Native |  |
| Holothura
pervicax | stubborn
sea cucumber | loli
ka'e | rare | Native |  |
| Holothura
whitmaei | teated
sea cucumber | loli | Occasional | Native |      |
| Holothura
n. sp. |  |  | rare | Native |  |
| Holothuriidae | sea
cucumbers | loli |  |  |  |
| Hydatina amplustra | swollen
bubble shell | pupu
leholeho'oni'oni'o | Occasional | Native |
    |
| Hydalina physis | brown-line
paperbubble | pupu
leholeho | Rare | Native |  |
| Idoteidae |  |  |  |  |  |
| Iotrochota
protea |  |  | Uncommon | Native |
  |
| Iotrochotlidae |  |  |  |  |  |
| Iphione muricata | spiny
scale worm |  | Occasional | Native |  |
| Isaeidae |  |  |  |  |  |
| Isaurus tuberculatus
|  |  | Rare | Native |  |
| Ischyroceridae |  |  |  |  |  |
| Ischyrocerus
oahu |  |  | occasional | Native |  |
| Ischnochitonidae | chitons | pupu
mo'o |  |  |  |
| Ischnochiton
petaloides | flat
chiton |  | occasional | Native |  |
| Isognomidae | purse
shells |  |  |  |  |
| Isognomom
californicum | black
purse shell | nahawele | Common | Native |   
|
| Isognomom
incisum |  |  | Occasional | Native |  |
| Isognomom
legumen |  |  | Rare | Native |  |
| Isognomom
perna | brown
purse shell | nahawele | Common | Native |
   |
| Ittibittium
parcum |  |  | Occasional | Native |  |
| Ittibittium
zebrum |  |  | Uncommon | Native |  |
| Jacforus
cavatus |  |  | rare | Native |  |
| Jaeropsidae |  |  |  |  |  |
| Jaeropsis
hawaiiensis |  |  | uncommon | Native |  |
| Janiridae |  |  |  |  |  |
| Joculator
sp.
(ridicula?) |  |  | Uncommon | Native |  |
| Julia exquisita
|  |  | Occasional | Native |  |
| Juliidae |  |  |  |  |  |
| Kermia
sp.
|  |  | Occasional | Native |  |
| Labidodemus
semperianum | white
sea cucumber |  | Uncommon | Native |  |
| Lembos leapakahi |  |  | uncommon | Native |  |
| Lembos waipio |  |  | occasional | Native |  |
| Lepadidae | goose
barnacles |  |  |  |  |
| Lepas anserifera | goose
barnacle |  | Uncommon | Native |  |
| Leptastrea
bewickensis |  |  | rare | Native |  |
| Leptastrea
purpurea |  |  |  | Native |    |
| Leptocheilia
dubia |  |  | uncommon | Native | |
| Leptodius
gracilis |  |  | rare | Native |  |
| Leptodius
sanguineus |  |  | occasional | Native |  |
| Leptodius
waialuanus |  |  | rare | Native |  |
| Leptothyra
rubricincta |  |  | Occasional | Native |  |
| Leptothyra
verruca |  |  | Occasional | Native |  |
| Leucetta sp.
1. (solida?) | white
leucetta (sponge) |  | Occasional | Native |  |
| Leucetta sp.
2. | leucetta
(sponge) |  | Uncommon | Native |  |
| Leucettidae | (sponge) |  |  |  |  |
| Leucosiidae | purse
crabs |  |  |  |  |
| Leucothoe
tridens |  |  | uncommon | Native |  |
| Leucothoidae |  |  |  |  |  |
| Ligia sp. | rock
louse |  |  | Native |  |
| Liljeborgia
heeia |  |  | rare | Native |  |
| Liljeborgiidae |  |  |  |  |  |
| Lima sp.
(juv) |  |  | Uncommon | Native |  |
| Limidae | file
shells |  |  |  |  |
| Liocarpilodes
biunguis |  |  | occasional | Native |  |
| Liocarpilodes
integerrimus |  |  | occasional | Native |  |
| Liomera bella | pretty
liomera |  | occasional | Native |    |
| Liomera rugata | corrugated
liomera |  | rare | Native |  |
| Littoraria
pinado | dotted
periwinkle |  | Abundant | Native |  |
| Littorinidae | periwinkles |  |  |  | |
| Loimia medusa | Medusa
spaghetti worm | kauna'oa | Common | Native |  |
| Loliginidae |  |  |  |  |  |
| Lophocochlias
minutissimus |  |  | Occasional | Native |  |
| Lophozozymus
dodone |  |  | rare | Native |  |
| Lophozozymus
pulchellus |  |  | rare | Native |  |
| Lophozozymus
sp. (juv) |  |  | rare | Native |  |
| Lucinidae | lucines |  |  |  |  |
| Lumberineresis
dentata |  |  | rare | Native |  |
| Lumbrineridae |  |  |  |  |  |
| Lybia edmondsoni | Hawaiian
pom-pom crab | kumimi
pua | rare | Native |  |
| Lysianassidae |  |  |  |  |  |
| Lysidice ninetta |  |  |  | Native |  |
| Macrothricidae | spiny
oysters |  |  |  |  |
| Maculotriton
bracheatus |  |  | rare | Native |  |
| Maera insignis |  |  | occasional | Native |  |
| Maera pacifica |  |  | occasional | Native |  |
| Maera quadrimana |  |  | occasional | Native |  |
| Majidae | spider
crabs |  |  |  |  |
| Marginellidae |  |  |  |  |  |
| Medaeops neglectus |  |  | rare | Native |  |
| Melampidae |  |  |  |  |  |
| Melampus
castaneus |  |  | Uncommon | Native |  |
| Merelina granulosa
|  |  | Occasional | Native |  |
| Merelina wanawana
|  |  | Occasional | Native |  |
| Mesanthura
hieroglyphica |  |  | rare | Native |  |
| Metopograpsus
messor |  | 'alamihi | occasional | Native |  |
| Metopograpsus
thukuhar |  | kukuau | rare | Native |  |
| Miralda
paulbatschi |  |  | Uncommon | Native |  |
| Mitra fastigium |  |  | rare | Native |  |
| Mitra luctuosa |  |  | Uncommon | Native |  |
| Mitra saltata |  |  | Uncommon | Native |  |
| Mitra stictica | punctured
mitre |  | Uncommon | Native |
  |
| Mitrella margarita |  |  | Occasional | Native |  |
| Mitridae | mitres | 'aha'aha |  |  |  |
| Mitridae sp.
|  |  | Uncommon | Native |  |
| Modulidae | modulus
shells |  |  |  |  |
| Modulus tectum |  |  | occasional | Native |  |
| Monocorrophium
acherusicum |  |  | rare | Native |  |
| Montipora
capitata | rice
coral |  | Uncommon | Native |    |
| Montipora
flabella | blue
rice coral |  | Uncommon | Native |    |
| Montipora
patula |  |  | Occasional | Native |   |
| Morula foliacea |  |  | rare | Native |  |
| Morula granulata
| granular
drupe | maka'awa | Occasional | Native |  |
| Morula uva | grape
morula |  | Common | Native |  |
| Munnidae |  |  |  |  |  |
| Muricidae |  |  |  |  |  |
| Mytilidae | mussels |  |  |  |  |