Solitary Islands Marine Park sweetlip ("Plectorhinchus gibbosus") occur with mulloway ("Argyrosomus japonicus"), snapper, red morwong ("Cheilodactylus fuscus"), silver trevally ("Pseudocaranx georgianus"), bream ("Acanthopagrus" spp.) and tarwhine ("Rhabdosargus sarba"). Marine turtles are common in the Park, with green turtle ("Chelonia mydas"), loggerhead turtle ("Caretta caretta"), hawksbill turtle ("Eretmochelys imbricata") and occasional sightings of leatherback turtles. Nesting green turtles and loggerhead turtles have been recorded on several beaches, with some eggs hatching successfully. Only a few species of sea snakes have been recorded in the region, including the Elegant sea snake ("Hydrophis elegans") and Yellow-bellied sea snake ("Pelamis platurus"). The only reptile recorded on Muttonbird Island
Loggerhead shrike shrikes may eat or discard their bodies or else feed them to their remaining young. The oldest recorded age of a loggerhead shrike was 12 years and 6 months. Loggerhead shrike populations have been decreasing in North America since the 1960s. Reasons behind the decline remain unclear, although suggestions include habitat loss, pesticide contamination, climate change and human disturbance. The eastern loggerhead shrike ("L.l. migrans") is critically endangered in Canada, with fewer than 35 known breeding pairs in Canada. The San Clemente Island shrike, "L. l. mearnsi", is critically endangered, with a population as low as 5-10 individuals during 1983-1988.