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- Dorids (clades Anthobranchia, Doridacea, Doridoidea)
- recognised by branchial (gill) plume, formed as a cluster on the posterioe of the body
- They breathe with the branchial plume, which projects from their anus
- Have a thick mantle that extends over the foot.
- Some mantles are covered with tubercles, varying in size, numbers and shapes
- Fringes on the mantle do not contain any intestines
- Toxins are stored in the mantle as defense
- Toxins are extracated from food sources
- Currently 101 classified species
- A molecular phylogeny of the family Chromodorididae resulted in this genus being restricted to smaller number of species than formerly,
- Most have longitudinal black lines on the mantle.
- Many former members of Chromodoris were transferred to Goniobranchus
- Commonly found in tropical and subtropical waters
- Usually living as members of reef communities
- Exhibit one of the two major body types found within Nudibranchia
- Breathe oxygen principally through their gills, usually positioned in a featherlike structure located around the anus at their posterior, called the branchial plume.
- A few major bodily features separate chromodorids from other sea slugs.
- These species characteristically have black stripes along their bodies and linear spawning.
- Commonly exhibit chemical defenses to protect themselves from predators
- Dorids have a thick mantle that exists over their foot, and in some species, the mantle can have tubercles (nodules along the surface of an organism that are made of keratin) of different concentrations, shapes, and sizes, providing some rigidity and protection
- Use of bioactive compounds like alkaloids, diterpenes, and sesquiterpenes from the sponges they feed on
- Transport and store toxic compounds in specialized storage glands located in strategic locations throughout the mantle, called mantle dermal formations (MDFs).
- MDFs can harbor extremely high concentrations of distasteful and potent compounds in comparison to the rest of their body
- Are simultaneous hermaphrodites, each individual possesses both male and female reproductive structures
- During mating, in an act called “penis fencing”
- Two individuals compete for the position of male, by darting their penises at one another
- The victor is the one who penetrates the body wall of the other and impregnating them,
- Forcing the other to act as the female.
- The female lays eggs onto a substrate,
- Eggs hatch planktonic vestigial veliger larva, who further evolve into adults
- Prey primarily on sponges.
Wikipedia, 2022. Chromodoris. Accessed at https://en.wikipedia.org/wiki/Chromodoris dated 02.04.2022
Chromodoris tinctorial (Ruppell & Leuckart, 1828)
Non Victorian Nudibranchs
Chromodoris lochi (Rudman, 1982)
Ceratosoma brevicaudatum (Abraham, 1876)
Tambja dracomus (Willan & Y.-W. Chang, 2017)
Tambja verconis (Basedow & Hedley, 1905)
Polycera hedgpathi (Er. Marcus, 1964)
Kaloplocamus ramosus (Cantraine,1835)
Photo by Paul Sorensen
Photo by Paul Sorensen