This is the unpalatable Flastworm Pseudoceros scintillatus. Source.
And talking of (Batesian) mimicry - how cool is this!
Story here - enjoy!
Blog about "The World's best Shark Dive" by Beqa Adventure Divers. Featuring up to eight regular species of Sharks and over 400 different species of fish, Shark diving doesn't get any better!
Bimini Island in the Bahamas lies just 48 miles from Miami, Florida and is an ecological wonderland.
But for the past 17 years, Bimini has faced serious environmental threat in the form of a US-owned development. Much of the Island's mangrove forest has already been dredged out to build luxury homes, a casino and most recently, a Hilton hotel. Just to the east of the development lies East Wells, Bimini's only remaining pocket of pristine habitat, but the development is growing and the latest marketing brochures advertise a golf course which will be the final blow to the people of Bimini and the ecosystem on which they depend.
A new government has just been voted into power.
This video is an appeal from the Biminites for the declaration of a marine protected area that will protect their environment. We call on the Hilton Hotel Group to do the right thing and halt any development that will destroy East Wells - a critical nursery area for all marine life in this region of the Caribbean.
The cruelty at play, at times, gives the dolphin slaughter in Taiji, Japan, a run for its money.
The story that unfolded across the Chesapeake Bay is one that should give reason to pause: people were quick to read into unrelated research; to scapegoat; to find blame where they wanted. It’s a lesson about the dangers of oversimplifying science. But there is nothing simple about coastal ecosystems, where a multitude of species and processes interact—many of which have yet to be discovered.
Over-Simplification Can Hinder Effective Shark Fisheries Management
The general tendency for sharks to grow more slowly, mature later, and produce fewer young than most fished species is fundamental to the appropriate elevation of their conservation priority and the prevention of population depletion. The fact remains, however, that life history characteristics vary widely across shark species, with many capable of supporting a significant level of fishing if such extraction (in all forms) is limited to science-based levels.
After more than two decades of expanding efforts to publicize sharks’ inherent vulnerability, people appear to increasingly believe that sharks cannot withstand any fishing at all.
Similarly, there appears to be a trend toward blanket bans on fishing and trading, with a focus on shark fins. While complete bans are appropriate, and even long overdue with respect to species that are exceptionally threatened (like sawfishes) and exceptionally vulnerable (such as devil rays), in other cases the unequivocal messages and ‘one size fits all’ remedies may serve to hinder policies needed to curb fishing and ensure sustainability.
Under a general perception that sustainable shark fishing is impossible, there is reduced support for the work necessary to formulate comprehensive fishery management policies that allow for sustainable take while addressing unintentional bycatch, and the need for population assessment. Governments convinced that managing shark fishing is a losing proposition and/or publically unacceptable may opt for full protection, but may also shy away from attempting to set any limits at all. Those opting for blanket bans may be reluctant to admit and address significant incidental shark mortality and/or enforcement inadequacies.
Sharks Contribute to Food Security in Poor and Developing Nations
While shark meat, in some cases, provides a high value product (e.g. gummy shark in southern Australia, porbeagle in Europe, and skates in Korea), it is more often a cheap source of animal protein. The low value stems from the relatively low quality of the product (due to high levels of urea) and the fact that it is often dried for non-perishable storage and transport. While domestic catch and consumption is common, some countries rely heavily on imports and exports, e.g. Sri Lanka, Uruguay, Brazil, Peru, Indonesia, and India. According to FAO statistics, more than 90% of the world’s reported shark catch is taken by 26 fishing nations (Figure 2), one-quarter of which (7/26) are among the least developed nations (with low or medium Human Development Index scores; Figure 2). Moreover, 40% of the reported global shark catch comes from seven of the major shark fishing nations with the lowest Human Development Indices, most of which border the Indian Ocean (Indonesia, India, Pakistan, Yemen, and Tanzania) and Eastern Atlantic Ocean (Nigeria and Senegal;
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Generally, it is costly to replace fishery losses in countries where seafood provides a high proportion of animal protein. It is understandably difficult for governments in nations facing extreme poverty and food security crises to prioritize shark conservation, particularly when scientific advice for sustainable catch levels is lacking. Similarly, conservationists as well as governments of developed countries are understandably reluctant to press struggling governments for such actions.
Our study found shark abundance to be primarily driven by fish biomass amongst lower trophic levels and functional groups.
The importance of fish biomass in predicting shark abundance suggests the necessity of ecosystem level protection, involving all species and functional groups, rather than species-specific policies, such as shark sanctuaries, which might still permit on-going depletion of prey species.
Similarly, studies across a range of marine ecosystems have found that assemblages of top level predators such as sharks require both healthy environments in terms of prey availability, and a wide range of habitat zones to accommodate different species’ habitat preferences and to permit resource partitioning and ontogenetic changes in habitat use. Individual species or life stages preferentially use particular habitat zones or depth ranges, and, though often highly site-resident, reef shark species have been shown capable of making long movements between neighbouring reefs.
This implies that marine reserves that encompass a wide variety of habitats within the boundaries of the protected area may be more effective in preserving species diversity in the shark assemblage and providing the habitat niches required at different life stages. Very large MPAs such as the BMR, in contrast to more narrowly scoped or zoned protection regimes, have the additional advantage of protecting not only known and surveyed habitats but also the unknowns.